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Página 189 - I conclude that they stand to each other in the relation of cause and effect.
Página 153 - TJiefucl value of food. — Heat and muscular power are forms of force or energy. The energy is developed as the food is consumed in the body. The unit commonly used in this measurement is the calorie, the amount of heat which would raise the temperature- of a pound of water 4° F.
Página 4 - Watch the cloud banner from the funnel of a running locomotive : you see it growing gradually less dense. It finally melts away altogether, and, if you continue your observations, you will not fail to notice that the speed of its disappearance depends on the character of the day.
Página 123 - It does not appear to me', he writes, 'that there is anything which human sagacity can fathom, within the wide-extended bounds of the visible creation, which affords a more striking or more palpable proof of the wisdom of the Creator, and of the special care He has taken in the general arrangement of the Universe to preserve animal life, than this wonderful contrivance'.
Página 132 - ... fresh? Some of these gentlemen are known in the scientific world ; and many of them supported their opinions by quoting the highest written authorities on the subject, chiefly Tyndall's - Forms of Water/ p. 132, par. 339, which tells us that " even when water is saturated with salt, the crystallizing force studiously rejects the salt, and devotes itself to the congelation of the water alone. Hence the ice of sea-water, when melted, produces fresh water.