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Page 7 - Every particle of matter, in the universe, attracts every other particle with a force, which is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
Page 64 - In the present state of science the most universal standard of length which we could assume would be the wave length in vacuum of a particular kind of light, emitted by some widely diffused substance such as sodium, which has well-defined lines in its spectrum. Such a standard would be independent of any changes in the dimensions of the earth, and should be adopted by those who expect their writings to be more permanent than that body.
Page 321 - This theoretical description fits the winds actually observed over the greater part of the world. From 30° latitude to the equator are found the northeast trade winds of the Northern Hemisphere and the southeast trade winds of the Southern Hemisphere. Both blow quite steadily and meet to form the International Convergence Zone near the equator.
Page 6 - Mars passed over different portions of its orbit, he found that they were to one another as the areas described by the lines drawn from the centre of the planet to the centre of the sun, or, in more technical terms, that L the radius vector describes equal areas in equal times.