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We mean that resulting from a certain slow astronomic rhythm, by which the northern and southern hemispheres are alternately subject to greater extremes of temperature. In consequence of the slight ellipticity of its orbit, the Earth's distance from the sun varies to the extent of some 3,000,000 of miles.
It is less personal to us. The astronomer has the advantage of the biologist in one important respect: he can show us in the heavens now the process of the evolution of worlds actually going on, but the biologist cannot show us the transformation of one species into another taking place to-day. We can sound the abysses of astronomic space easier than we can sound the abysses of geologic time.
They chatter like birds and gabble like geese, without the trouble of thinking. The things they see and hear every day awaken no consecutive thought. The stars shine above them, and they call them pretty things, but never ask the astronomic story of their magnificence. The world beats its great march of life around them, but they seek not to know the rich lessons of human activity therein.
F. Smith, second assistant, were placed in charge of the chronometers and the necessary astronomic instruments, with instructions to observe on the meridian of the St. Croix at Houlton, and again at its intersection with the river St. John, for the purpose of ascertaining the rate taken by the chronometers when carried.
In astronomic, geologic, and meteorologic changes, ever in progress, ever combining in new and more involved ways, we have a set of inorganic factors to which all organisms are exposed; and in the varying and complicated actions of organisms on one another we have a set of organic factors that alter with increasing rapidity.
Not a tree, not a shrub, not a flower, not a green thing growing, not an insect of an hour, but has a background of a vast aeon of geologic and astronomic time, out of which the forces that shaped it have emerged, and over which the powers of chaos and darkness have failed to prevail.
Behold the four principal elements forming stones and soils and water and air for whole geologic or astronomic ages, and then behold them forming plants and animals, and finally forming the brains that give us art and literature and philosophy and modern civilization. What prompted the elements to this new and extraordinary behavior? Science is dumb before such a question.
The result of the astronomic observations seemed to show that the main stream would lead too far to the eastward, and after mature deliberation it was resolved that the course should be retraced and the Mistigougeche ascended. The first part of the operation was attended with little delay. Half an hour sufficed for reaching the forks, whence the party had been six hours in mounting.
These curious peculiarities of the lunar surface had interested the astronomic mind to a very high degree at their first discovery, and have proved to be very perplexing problems ever since. The first observers do not seem to have noticed them. Neither Hevelius, nor Cassini, nor La Hire, nor Herschel, makes a single remark regarding their nature.
A little farther on there is another unexplained figure: that of a man with his feet crossed, swinging joyously on a rope from the top of a tower. Soon after the Crowning of Harold, may be seen a crowd of people gazing at an astronomic phenomenon which has been described by an old chronicler as a "hairy star."
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