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The spring buffers, which, as has been said, form an essential part of the quadrant, are fitted with steel rollers at the point of contact with the crosshead, thereby reducing the friction to a minimum. The springs, by their compression, absorb any shock coming on the rudder, and greatly reduce the vibration when struck by a sea. They are made adjustable, and can be either steel or rubber.
Had it not been for this opportune apparition, it is quite possible that Tycho might have found a career in some direction less beneficial to science than that which he ultimately pursued. When he reached his home on this memorable evening, Tycho immediately applied his great quadrant to the measurement of the place of the new star.
Again, barring the door behind him, he sat before the audioceiver and began calling the Polaris. "This is Cadet Corbett aboard rocket ship Space Knight in quadrant four, chart C for Charley. Corbett aboard spaceship Space Knight in quadrant four, chart C for Charley! Come in, Commander Walters! Come in!"
They appear to be most numerous on the high-level plains and plateaus in the south-western quadrant, and may be counted by hundreds under good atmospheric conditions on the outer slopes of Walter, Clavius, and other large enclosures. In these positions they are often so closely aggregated that, as Nasmyth remarks, they remind one of an accumulation of froth.
Thus Hadley and Godfrey almost simultaneously invented the quadrant, the one in London, the other in Philadelphia; and the process of electrotyping was invented at the same time by Mr. Spencer, a working chemist at Liverpool, and by Professor Jacobi at St. Petersburg.
Moreover, and perhaps with special reference to Doctor Long Ghost and myself, he assured us generally that, if there were any among us studiously inclined, he would take great pleasure in teaching such the whole art and mystery of navigation, including the gratuitous use of his quadrant.
In 1721, however, he obtained a grant of 500 pounds from the Board of Ordnance, and accordingly a transit instrument was erected in the same year. Some time afterwards he procured an eight-foot quadrant, and with these instruments, at the age of sixty-four, he commenced a series of observations on the moon.
Being carried on its own center, and not, as is usual, on the rudder stock, and with its rim supported on rollers, the quadrant does not impose upon the rudder pintles any of its own weight, thus diminishing the wear on these parts.
I was drawn in by several persons to make that simple purchase. The year I bought it, I had my ascendant directed into a Trine of Jupiter first, and in the same year into the Cauda Draconis my fortune into a quadrant of Mercury. During my being there, the steeple of St.
He came on deck at eleven o'clock, with the quadrant under his coat. As it was thick drizzling, the men looked at him with amazement. He went to his cabin, prayed, and came up. There seemed still to be no hope. Again he went down and prayed, and again he appeared on deck with his quadrant in his hand.
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