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It was evidently an officer's cabin, for there, over the head of the bed, was the picture of a young lady he adored, and also some neatly fitted shelves of books, a rack of telescopes, and other seaman-like contrivances. "Am I to have this cabin to myself?" asked Augusta of the steward. "Yes, Miss; those are the captain's orders. It is Mr. Jones's cabin. Mr.
He knew that the greatest telescopes on earth could not reveal the Callisto moving about in Jupiter's sunshine, as even a point of light, at that distance, and, notwithstanding Cortlandt's learning and Bearwarden's joviality, he felt at times extremely lonely. They swept along steadily for fifty hours, having bright sunny days and beautifully moonlit nights.
The ideas of all the subalterns do not pass the limits of the roadstead and its currents. They argue about the wind, and the anchorage, and the line of bearing. As for the crossing, that is your affair. You know more about it than they do, and your eyes are worth more than their telescopes. They have implicit faith in everything that you do. The admiral himself is in just the same condition.
The first telescopes were made in Holland, the originator being either Henry Lipperhey, Zacharias Jansen, or James Metius, and the date 1608 or earlier. In 1609 Galileo, being in Venice, heard of the invention, went home and worked out the theory, and made a similar telescope.
Now this very fact is observed in the most evident manner. In the second half of the year 1892 the southern polar cap was in full view; during that interval, and especially in the months of July and August, its rapid diminution from week to week was very evident even to those observing with common telescopes.
The making of achromatic lenses for telescopes had been accomplished, it is true, by Dolland in the previous century, by the union of lenses of crown glass with those of flint glass, these two materials having different indices of refraction and dispersion.
A hypsometer to measure the altitude of the lunar mountains, a sextant to take the height of the sun, a theodolite, an instrument for surveying, telescopes to be used as the moon approached all these instruments were carefully inspected and found in good condition, notwithstanding the violence of the initial shock.
Looking up at them through our telescopes, it frequently seemed that they had got themselves into such a position, that it would be equally impossible for them to attempt either to go forward or to return without precipitating themselves headlong to the bottom of the precipice.
It is, however, in the construction of refracting telescopes that the most conspicuous advances have recently been made. The Harvard College 15-inch achromatic was mounted and ready for work in June, 1847. A similar instrument had already for some years been in its place at Pulkowa.
Then came a renewal of the footsteps, a sharp tap upon the door, a loud "Come in!" and a very closely cropped and shaven, sun-browned face appeared, its owner clad in clean, white military flannel, drawing himself up stiffly as he held out the missive he was bearing. "Letter, sir." "Well, bring it here. My arms are not telescopes." "Pouf! No, sir. Here you are, sir."
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