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according action activity actual amount amount of energy angle appear becomes body Book cause comet component concerned conservation considered constant continually dark definite developed direction distance earth effect energy entirely equal equation evidence exertion existence explain fact finite force further given globe gravitation greater hand heat increase inertia infer intensity Jupiter kinetic larger least less light limit magnitude mass matter mean measure microf molar molecular moon motion moving mystery nature nebula observed once orbit original overcome perihelion period phenomena physical physicists planets position possible present principle produce Professor proportional proposition proved quantity question reader reason reference remark represent resistance respect rest resulting rotation Sect seems solar space spent stars substance supposed surface temperature term theory thermal things tion true truth unit universe velocity whole
Page 24 - The total energy of any body or system of bodies is a quantity which can neither be increased nor diminished by any mutual action of such bodies, though it may be transformed into any one of the forms of which energy is susceptible.
Page 87 - The vis insita, or innate force of matter, is a power of resisting, by which every body, as much as in it lies, continues in its present state, whether it be of rest, or of moving uniformly forwards in a right line.
Page 132 - ... forces describes the diagonal of a parallelogram, in the same time that it would the sides with separate.
Page 88 - Matter has an innate power of resisting external influences, so that every body, as far as it can, remains at rest or moves uniformly in a straight line.
Page 321 - ... could not differ from 71° Fahr, by more than a single degree. Now, from the Bible we learn that both plants were simultaneously cultivated in the central valleys of Palestine, in the time of Moses, and its then temperature is thus definitively determined.
Page 403 - Amusements of Life. When they meet an Acquaintance in the Morning, the first Question is about the Sun's Health, how he looked at his Setting and Rising, and what Hopes they have to avoid the Stroke of the approaching Comet.
Page 239 - The quantity of heat lost or gained by a body in a second is proportional to the difference between its temperature and that of .the surrounding medium.
Page 300 - Ш) one yet knows. The spectroscope, if we interpret its indications in the usual way, tells us that a comet is simply a mass of hydrocarbon vapor, shining by its own light. But there must be something wrong in this interpretation. That the light is reflected sunlight seems to follow necessarily from the increased brilliancy of the comet as it approaches the sun and its disappearance as it passes away.