The forms of water in clouds & rivers, ice & glaciers / by John Tyndall ... with thirty-five illustrations drawn and engraved under the direction of the author.

  • Tyndall, John, 1820-1893.
Date:
1873
Catalogue details

Licence: Public Domain Mark

Credit: The forms of water in clouds & rivers, ice & glaciers / by John Tyndall ... with thirty-five illustrations drawn and engraved under the direction of the author. Source: Wellcome Collection.

Provider: This material has been provided by King’s College London. The original may be consulted at King’s College London.

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    portion ? The dark heat of the sun. The great body of the light waves and even a portion of the dark ones. LIQUID FLOWERS IX LAKE ICE. pass through the ice without losing any of their heating power. When properly concentrated on combustible bodies, even after having passed through the ice, their burning power becomes manifest. 103. And the ice itself may be employed to con- centrate them. With an ice-lens in the polar regions Dr. Scoresby has often concentrated the sun’s rays so as to make them burn wood, fire gunpowder, and melt lead; thus proving that the heating power is retained by th-e rays> even after they have passed through so cold a substance. 104. By rendering the rays of the electric lamp parallel, and then sending them through a lens of ice, we obtain all the effects which Dr. Scoresby obtained with the rays of the sun.