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A CRITICAL EXAMINATION OF THE POSITION OF MR. DARWIN'S WORK, "ON THE ORIGIN OF SPECIES,"

by Thomas Henry Huxley

A Critical Examination of the Position of Mr. Darwin's Work, "On the Origin of Species," in Relation to the Complete Theory of the Causes of the Phenomena of Organic Nature Lecture VI. (of VI.), "Lectures to Working Men", at the Museum of Practical Geology, 1863, on Darwin's Work: "Origin of Species"

Factors affecting climate (Large Print)


There are two diagrams of the Earth on this page; one is at the top of the page and the other at the bottom. Each has a dashed line image border. There is a locator dot shown, which will be at the top left of the page when the image is the right way up. Winter: In the top diagram, to the left of the page, there is a textured disc representing the Earth, with a ring of another texture showing the atmosphere surrounding it. On the top right part of the Earth there are two heavy lines showing the area of the Earth's surface heated by the sun's rays, which are represented by two textured bars extending to the right. This shows how, in northerly areas in winter, the sun's rays are spread out more and have to travel further through the atmosphere. These factors, together with shorter winter days and increased reflection of the sun's energy back into space, all have the effect of reducing the amount of energy available for heating the surface of the Earth. A heavy dashed line showing the Equator goes across at an angle halfway up the disc. The Earth's axis is shown at its top and bottom by short heavy lines. To the right of these are four descriptive labels. Summre: In the diagram at the bottom of the page there are descriptive labels to the left. To the right of the page, there is a textured disc representing the Earth, with a ring of another texture showing the atmosphere surrounding it. On the top left part of the Earth there are two heavy lines showing the area of the Earth's surface heated by the sun's rays, which are represented by two textured bars extending to the left. This shows how, in northerly areas in summer, the sun's rays are spread out less and have to travel a shorter distance through the atmosphere. These factors, together with longer summer days and decreased reflection of the sun's energy back into space, all have the effect of increasing the amount of energy available for heating the surface of the Earth. A heavy dashed line showing the Equator goes across at an angle halfway up the disc. The Earth's axis is shown at its top and bottom by short heavy lines.

Factors affecting climate (UEB Contracted)


There are two diagrams of the Earth on this page; one is at the top of the page and the other at the bottom. Each has a dashed line image border. There is a locator dot shown, which will be at the top left of the page when the image is the right way up. Winter: In the top diagram, to the left of the page, there is a textured disc representing the Earth, with a ring of another texture showing the atmosphere surrounding it. On the top right part of the Earth there are two heavy lines showing the area of the Earth's surface heated by the sun's rays, which are represented by two textured bars extending to the right. This shows how, in northerly areas in winter, the sun's rays are spread out more and have to travel further through the atmosphere. These factors, together with shorter winter days and increased reflection of the sun's energy back into space, all have the effect of reducing the amount of energy available for heating the surface of the Earth. A heavy dashed line showing the Equator goes across at an angle halfway up the disc. The Earth's axis is shown at its top and bottom by short heavy lines. To the right of these are four descriptive labels. Summre: In the diagram at the bottom of the page there are descriptive labels to the left. To the right of the page, there is a textured disc representing the Earth, with a ring of another texture showing the atmosphere surrounding it. On the top left part of the Earth there are two heavy lines showing the area of the Earth's surface heated by the sun's rays, which are represented by two textured bars extending to the left. This shows how, in northerly areas in summer, the sun's rays are spread out less and have to travel a shorter distance through the atmosphere. These factors, together with longer summer days and decreased reflection of the sun's energy back into space, all have the effect of increasing the amount of energy available for heating the surface of the Earth. A heavy dashed line showing the Equator goes across at an angle halfway up the disc. The Earth's axis is shown at its top and bottom by short heavy lines.

Factors affecting climate (UEB Uncontracted)


There are two diagrams of the Earth on this page; one is at the top of the page and the other at the bottom. Each has a dashed line image border. There is a locator dot shown, which will be at the top left of the page when the image is the right way up. Winter: In the top diagram, to the left of the page, there is a textured disc representing the Earth, with a ring of another texture showing the atmosphere surrounding it. On the top right part of the Earth there are two heavy lines showing the area of the Earth's surface heated by the sun's rays, which are represented by two textured bars extending to the right. This shows how, in northerly areas in winter, the sun's rays are spread out more and have to travel further through the atmosphere. These factors, together with shorter winter days and increased reflection of the sun's energy back into space, all have the effect of reducing the amount of energy available for heating the surface of the Earth. A heavy dashed line showing the Equator goes across at an angle halfway up the disc. The Earth's axis is shown at its top and bottom by short heavy lines. To the right of these are four descriptive labels. Summre: In the diagram at the bottom of the page there are descriptive labels to the left. To the right of the page, there is a textured disc representing the Earth, with a ring of another texture showing the atmosphere surrounding it. On the top left part of the Earth there are two heavy lines showing the area of the Earth's surface heated by the sun's rays, which are represented by two textured bars extending to the left. This shows how, in northerly areas in summer, the sun's rays are spread out less and have to travel a shorter distance through the atmosphere. These factors, together with longer summer days and decreased reflection of the sun's energy back into space, all have the effect of increasing the amount of energy available for heating the surface of the Earth. A heavy dashed line showing the Equator goes across at an angle halfway up the disc. The Earth's axis is shown at its top and bottom by short heavy lines.

High and low pressure belts (Large Print)


The image on this page is of the Earth and shows belts of high and low pressure and prevailing winds. There is a locator dot shown, which will be at the top left of the page when the image is the right way up. There are labels to the left of the page. In the centre there is a disc with horizontal bands of texture representing the planet Earth with high and low air pressure areas. On the disc, there are curved lines with arrowheads showing the directions of prevailing winds. There is also a heavy dashed horizontal straight line showing the Equator with horizontal dashed lines up and down the page from this showing the tropics of Cancer and Capricorn. To the right of this are curved lines with arrowheads showing rising and descending air.

High and low pressure belts (UEB Contracted)


The image on this page is of the Earth and shows belts of high and low pressure and prevailing winds. There is a locator dot shown, which will be at the top left of the page when the image is the right way up. There are labels to the left of the page. In the centre there is a disc with horizontal bands of texture representing the planet Earth with high and low air pressure areas. On the disc, there are curved lines with arrowheads showing the directions of prevailing winds. There is also a heavy dashed horizontal straight line showing the Equator with horizontal dashed lines up and down the page from this showing the tropics of Cancer and Capricorn. To the right of this are curved lines with arrowheads showing rising and descending air.

High and low pressure belts (UEB Uncontracted)


The image on this page is of the Earth and shows belts of high and low pressure and prevailing winds. There is a locator dot shown, which will be at the top left of the page when the image is the right way up. There are labels to the left of the page. In the centre there is a disc with horizontal bands of texture representing the planet Earth with high and low air pressure areas. On the disc, there are curved lines with arrowheads showing the directions of prevailing winds. There is also a heavy dashed horizontal straight line showing the Equator with horizontal dashed lines up and down the page from this showing the tropics of Cancer and Capricorn. To the right of this are curved lines with arrowheads showing rising and descending air.

Climate map of Europe, north and central Africa (Large Print)

by Rnib Bookshare

This is a multi-page image of climate maps of Europe, north and central Africa, set on three pages. There are locator dots shown, which will be at the top left of each page when the images are the right way up.Key for climate map of Europe, north and central Africa: This page shows the key for the climate maps of Europe, north and central Africa. The rectangular areas of texture (or colour) representing the various climate regions found on the two map pages, are shown on the left of the page with descriptive text to the right. They are grouped so that areas of similar climate type appear near each other; so 'Tropical monsoon' follows 'Tropical equatorial'. Climate map - Europ: This is a map of Europe bounded by a dashed line image border. The map shows a part of Greenland in the top left hand corner. The right hand part of the page shows Western Europe and Russia. Blank areas within the image border show oceans. Climate map - north and central Africa : This is a map of north and central Africa bounded by a dashed line image border. The map shows a small portion of south America in the bottom left hand corner. In the middle of the page is central Africa. In the top right of the map is Israel and part of the Middle East. Blank areas within the image border show oceans.

Climate map of Europe, north and central Africa (UEB Contracted)

by Rnib Bookshare

This is a multi-page image of climate maps of Europe, north and central Africa, set on three pages. There are locator dots shown, which will be at the top left of each page when the images are the right way up.Key for climate map of Europe, north and central Africa: This page shows the key for the climate maps of Europe, north and central Africa. The rectangular areas of texture (or colour) representing the various climate regions found on the two map pages, are shown on the left of the page with descriptive text to the right. They are grouped so that areas of similar climate type appear near each other; so 'Tropical monsoon' follows 'Tropical equatorial'. Climate map - Europ: This is a map of Europe bounded by a dashed line image border. The map shows a part of Greenland in the top left hand corner. The right hand part of the page shows Western Europe and Russia. Blank areas within the image border show oceans. Climate map - north and central Africa : This is a map of north and central Africa bounded by a dashed line image border. The map shows a small portion of south America in the bottom left hand corner. In the middle of the page is central Africa. In the top right of the map is Israel and part of the Middle East. Blank areas within the image border show oceans.

Climate map of Europe, north and central Africa (UEB Uncontracted)

by Rnib Bookshare

This is a multi-page image of climate maps of Europe, north and central Africa, set on three pages. There are locator dots shown, which will be at the top left of each page when the images are the right way up.Key for climate map of Europe, north and central Africa: This page shows the key for the climate maps of Europe, north and central Africa. The rectangular areas of texture (or colour) representing the various climate regions found on the two map pages, are shown on the left of the page with descriptive text to the right. They are grouped so that areas of similar climate type appear near each other; so 'Tropical monsoon' follows 'Tropical equatorial'. Climate map - Europ: This is a map of Europe bounded by a dashed line image border. The map shows a part of Greenland in the top left hand corner. The right hand part of the page shows Western Europe and Russia. Blank areas within the image border show oceans. Climate map - north and central Africa : This is a map of north and central Africa bounded by a dashed line image border. The map shows a small portion of south America in the bottom left hand corner. In the middle of the page is central Africa. In the top right of the map is Israel and part of the Middle East. Blank areas within the image border show oceans.

Development of a tropical storm - map (Large Print)


This diagram shows the development of a tropical storm, in map view (seen from above). There is a locator dot shown, which will be at the top left of the page when the image is the right way up. The image is surrounded by an image border. Most of the border is filled with a texture representing the sea. To the left of the page are descriptive labels and to the right a textured object shaped roughly like a ring doughnut. At the bottom left of the page, just above a label, are two arrows pointing to the left, indicating the direction of travel of the storm system. The right hand portion of the page shows the ring-shaped storm system with the clear 'eye' at its centre. It is surrounded by arrows showing the anti-clockwise (in the northern hemisphere) rotational direction of the system.

Development of a tropical storm - map (UEB Contracted)


This diagram shows the development of a tropical storm, in map view (seen from above). There is a locator dot shown, which will be at the top left of the page when the image is the right way up. The image is surrounded by an image border. Most of the border is filled with a texture representing the sea. To the left of the page are descriptive labels and to the right a textured object shaped roughly like a ring doughnut. At the bottom left of the page, just above a label, are two arrows pointing to the left, indicating the direction of travel of the storm system. The right hand portion of the page shows the ring-shaped storm system with the clear 'eye' at its centre. It is surrounded by arrows showing the anti-clockwise (in the northern hemisphere) rotational direction of the system.

Development of a tropical storm - map (UEB Uncontracted)


This diagram shows the development of a tropical storm, in map view (seen from above). There is a locator dot shown, which will be at the top left of the page when the image is the right way up. The image is surrounded by an image border. Most of the border is filled with a texture representing the sea. To the left of the page are descriptive labels and to the right a textured object shaped roughly like a ring doughnut. At the bottom left of the page, just above a label, are two arrows pointing to the left, indicating the direction of travel of the storm system. The right hand portion of the page shows the ring-shaped storm system with the clear 'eye' at its centre. It is surrounded by arrows showing the anti-clockwise (in the northern hemisphere) rotational direction of the system.

Great Britain and Ireland annual precipitation (Large Print)


This is a multi-page image of annual precipitation in Great Britain and Ireland, set on two pages. There are locator dots shown, which will be at the top left of each page when the images are the right way up. Great Britain and Ireland map: This page shows a map of Great Britain and Ireland only. It has a dashed line image border and a north arrow. The map of Great Britain and Ireland is in the middle of the page and extends to the top and bottom of the page. Mainland Great Britain is to the right and separated from Ireland by the Irish Sea. The north arrow is in the top right corner of the page and is framed by an image border. Great Britain and Ireland annual precipitation: This page shows a map of Great Britain and Ireland indicating rainfall in different areas. It has a key, a north arrow and a dashed line image border. The key is at the top left of the page. On the left, it shows examples of the textures (colours) used to indicate levels of rainfall, on the map, with descriptive labels to the right. The key is framed by an image border. Britain and Ireland are in the centre of the page and extend to the top and bottom of the page with mainland Britain on the right and Ireland on the left. In the top right corner of the diagram the north arrow is framed by an image border.

Great Britain and Ireland annual precipitation (UEB Uncontracted)


This is a multi-page image of annual precipitation in Great Britain and Ireland, set on two pages. There are locator dots shown, which will be at the top left of each page when the images are the right way up. Great Britain and Ireland map: This page shows a map of Great Britain and Ireland only. It has a dashed line image border and a north arrow. The map of Great Britain and Ireland is in the middle of the page and extends to the top and bottom of the page. Mainland Great Britain is to the right and separated from Ireland by the Irish Sea. The north arrow is in the top right corner of the page and is framed by an image border. Great Britain and Ireland annual precipitation: This page shows a map of Great Britain and Ireland indicating rainfall in different areas. It has a key, a north arrow and a dashed line image border. The key is at the top left of the page. On the left, it shows examples of the textures (colours) used to indicate levels of rainfall, on the map, with descriptive labels to the right. The key is framed by an image border. Britain and Ireland are in the centre of the page and extend to the top and bottom of the page with mainland Britain on the right and Ireland on the left. In the top right corner of the diagram the north arrow is framed by an image border.

Great Britain and Ireland annual precipitation (UEB Contracted)


This is a multi-page image of annual precipitation in Great Britain and Ireland, set on two pages. There are locator dots shown, which will be at the top left of each page when the images are the right way up. Great Britain and Ireland map: This page shows a map of Great Britain and Ireland only. It has a dashed line image border and a north arrow. The map of Great Britain and Ireland is in the middle of the page and extends to the top and bottom of the page. Mainland Great Britain is to the right and separated from Ireland by the Irish Sea. The north arrow is in the top right corner of the page and is framed by an image border. Great Britain and Ireland annual precipitation: This page shows a map of Great Britain and Ireland indicating rainfall in different areas. It has a key, a north arrow and a dashed line image border. The key is at the top left of the page. On the left, it shows examples of the textures (colours) used to indicate levels of rainfall, on the map, with descriptive labels to the right. The key is framed by an image border. Britain and Ireland are in the centre of the page and extend to the top and bottom of the page with mainland Britain on the right and Ireland on the left. In the top right corner of the diagram the north arrow is framed by an image border.

Great Britain and Ireland January temperatures (Large Print)


This is a multi-page image of Great Britain and Ireland January temperatures, set on two pages. There are locator dots shown, which will be at the top left of each page when the images are the right way up.Great Britain and Ireland map: This page shows a map of Britain and, Ireland. It has a dashed line image border and a north arrow. The map of Britain and, Ireland is in the middle of the page and extends to the top and bottom of the page. Mainland Great Britain is to the right and separated from Ireland by the Irish Sea. The north arrow is in the top right corner of the page and is framed by an image border. Great Britain and Ireland January temperatures: This is a map of Britain and, Ireland with a dashed line image border and a north arrow. Great Britain and Ireland are in the centre of the page extending to the top and bottom. Ireland is on the left and Great Britain on the right separated by the Irish Sea. There are five heavy dashed lines representing isotherms (lines of equal temperature) shown on the map. These run approximately north to south, although one of these, in the centre of Ireland, is a closed loop. The temperature labels are to be found to the bottom and to the right of the land mass. In the top right corner is a north arrow enclosed by a dashed line image border.

Great Britain and Ireland January temperatures (UEB Uncontracted)


This is a multi-page image of Great Britain and Ireland January temperatures, set on two pages. There are locator dots shown, which will be at the top left of each page when the images are the right way up.Great Britain and Ireland map: This page shows a map of Britain and, Ireland. It has a dashed line image border and a north arrow. The map of Britain and, Ireland is in the middle of the page and extends to the top and bottom of the page. Mainland Great Britain is to the right and separated from Ireland by the Irish Sea. The north arrow is in the top right corner of the page and is framed by an image border. Great Britain and Ireland January temperatures: This is a map of Britain and, Ireland with a dashed line image border and a north arrow. Great Britain and Ireland are in the centre of the page extending to the top and bottom. Ireland is on the left and Great Britain on the right separated by the Irish Sea. There are five heavy dashed lines representing isotherms (lines of equal temperature) shown on the map. These run approximately north to south, although one of these, in the centre of Ireland, is a closed loop. The temperature labels are to be found to the bottom and to the right of the land mass. In the top right corner is a north arrow enclosed by a dashed line image border.

Great Britain and Ireland January temperatures (UEB Contracted)


This is a multi-page image of Great Britain and Ireland January temperatures, set on two pages. There are locator dots shown, which will be at the top left of each page when the images are the right way up.Great Britain and Ireland map: This page shows a map of Britain and, Ireland. It has a dashed line image border and a north arrow. The map of Britain and, Ireland is in the middle of the page and extends to the top and bottom of the page. Mainland Great Britain is to the right and separated from Ireland by the Irish Sea. The north arrow is in the top right corner of the page and is framed by an image border. Great Britain and Ireland January temperatures: This is a map of Britain and, Ireland with a dashed line image border and a north arrow. Great Britain and Ireland are in the centre of the page extending to the top and bottom. Ireland is on the left and Great Britain on the right separated by the Irish Sea. There are five heavy dashed lines representing isotherms (lines of equal temperature) shown on the map. These run approximately north to south, although one of these, in the centre of Ireland, is a closed loop. The temperature labels are to be found to the bottom and to the right of the land mass. In the top right corner is a north arrow enclosed by a dashed line image border.

Great Britain and Ireland July temperatures (Large Print)


This is a multi-page image of Great Britain and Ireland July temperatures, set on two pages. There are locator dots shown, which will be at the top left of each page when the images are the right way up. Great Britain and Ireland map: This page shows a map of Great Britain and Ireland. It has a dashed line image border and a north arrow. The map is in the middle of the page and extends to the top and bottom of the page. Mainland Great Britain is to the right and separated from Ireland by the Irish Sea. The north arrow is in the top right corner of the page and is framed by an image border. Great Britain and Ireland July temperatures: This is a map of Great Britain and Ireland with a dashed line image border and a north arrow. Great Britain and Ireland are in the centre of the page extending to the top and bottom. Ireland is on the left and Britain on the right separated by the Irish Sea. There are six heavy dashed lines representing isotherms (lines of equal temperature) shown on the map. Most of these run from east to west, although two of the lines form closed loops; these are indicated by labels on the right. In the top right corner is a north arrow enclosed by a dashed line image border.

Great Britain and Ireland July temperatures (UEB Uncontracted)


This is a multi-page image of Great Britain and Ireland July temperatures, set on two pages. There are locator dots shown, which will be at the top left of each page when the images are the right way up. Great Britain and Ireland map: This page shows a map of Great Britain and Ireland. It has a dashed line image border and a north arrow. The map is in the middle of the page and extends to the top and bottom of the page. Mainland Great Britain is to the right and separated from Ireland by the Irish Sea. The north arrow is in the top right corner of the page and is framed by an image border. Great Britain and Ireland July temperatures: This is a map of Great Britain and Ireland with a dashed line image border and a north arrow. Great Britain and Ireland are in the centre of the page extending to the top and bottom. Ireland is on the left and Britain on the right separated by the Irish Sea. There are six heavy dashed lines representing isotherms (lines of equal temperature) shown on the map. Most of these run from east to west, although two of the lines form closed loops; these are indicated by labels on the right. In the top right corner is a north arrow enclosed by a dashed line image border.

Great Britain and Ireland July temperatures (UEB Contracted)


This is a multi-page image of Great Britain and Ireland July temperatures, set on two pages. There are locator dots shown, which will be at the top left of each page when the images are the right way up. Great Britain and Ireland map: This page shows a map of Great Britain and Ireland. It has a dashed line image border and a north arrow. The map is in the middle of the page and extends to the top and bottom of the page. Mainland Great Britain is to the right and separated from Ireland by the Irish Sea. The north arrow is in the top right corner of the page and is framed by an image border. Great Britain and Ireland July temperatures: This is a map of Great Britain and Ireland with a dashed line image border and a north arrow. Great Britain and Ireland are in the centre of the page extending to the top and bottom. Ireland is on the left and Britain on the right separated by the Irish Sea. There are six heavy dashed lines representing isotherms (lines of equal temperature) shown on the map. Most of these run from east to west, although two of the lines form closed loops; these are indicated by labels on the right. In the top right corner is a north arrow enclosed by a dashed line image border.

Development of a tropical storm - cross section (Large Print)


This page shows a tropical storm in cross section (cut through vertically and seen from the side). There is a locator dot shown, which will be at the top left of the page when the image is the right way up. The diagram has a dashed line image border. In the middle of the page there are arrows pointing down, and to either side of these the cross section through the clouds can be found. Going across the bottom of the page is a textured area representing the sea. The straight arrows in the middle of the page represent the flow of air down into the clear 'eye' of the storm system. To either side are textured areas of cloud. Within these textured areas, wiggly arrows show water vapour rising through the cloud from the sea. Rain is shown falling from the cloud to the sea at the bottom of the page. Three horizontal arrows, pointing right, can be found on the left of the page just above the sea. Three similar arrows, pointing left, can be found just above the sea on the right of the page. These all show airflow into the storm system.

Development of a tropical storm - cross section (UEB Uncontracted)


This page shows a tropical storm in cross section (cut through vertically and seen from the side). There is a locator dot shown, which will be at the top left of the page when the image is the right way up. The diagram has a dashed line image border. In the middle of the page there are arrows pointing down, and to either side of these the cross section through the clouds can be found. Going across the bottom of the page is a textured area representing the sea. The straight arrows in the middle of the page represent the flow of air down into the clear 'eye' of the storm system. To either side are textured areas of cloud. Within these textured areas, wiggly arrows show water vapour rising through the cloud from the sea. Rain is shown falling from the cloud to the sea at the bottom of the page. Three horizontal arrows, pointing right, can be found on the left of the page just above the sea. Three similar arrows, pointing left, can be found just above the sea on the right of the page. These all show airflow into the storm system.

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