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Later went into our carbide expenditure with Day: am glad to find it sufficient for two years, but am not making this generally known as there are few things in which economy is less studied than light if regulations allow of waste. Electrical Instruments For measuring the ordinary potential gradient we have two self-recording quadrant electrometers.
Setting the example, the captain sprang below, followed by Fred and Tom Singleton, who secured the charts, a compass, chronometer, and quadrant; also the log-book and the various journals and records of the voyage.
There we all worked out the reckoning, showing our respective calculations or "fudgings" as the case might be, to Mr Quadrant; when if these "passed muster," we entered the result in our log-books, along with other observations and facts connected with the daily routine of the ship and her progress towards her destination.
A large and strong pillar of oak, shod with iron, was driven into the ground, and kept in its place by solid mason work. To this pillar the quadrant was fixed in a vertical plane, and steps were prepared to elevate the observer, when stars of a low altitude required his attention.
When the rumbling blast of the steering jets sounded in the chamber and the meteor flash shifted on the scanner screen, he returned to the problem in his hand. Seven minutes later he turned to Strong and handed him the answer. "Present position by dead reckoning is northwest quadrant of Mars, chart O, area thirty-nine, sir," he announced confidently.
One of the most remarkable instruments that has ever been employed in studying the heavens was the mural quadrant which Tycho erected in one of the apartments of Uraniborg. By its means the altitudes of the celestial bodies could be observed with much greater accuracy than had been previously attainable. This wonderful contrivance is represented on the preceding page.
A moveable armillary sphere, three cubits in diameter. A quadrant of solid brass, one cubit radius, and divided into minutes by Nonian circles. An astronomical radius of solid brass, three cubits long. An astronomical ring of brass, a cubit in diameter. A small brass astrolabe.
I very soon was inform'd that these 3 was gone to the Eastward in quest of it, and some time after I followed myself with a small party of Men; but before I went away I gave orders that if Tootaha came either to the Ship or the Fort he was not to be detain'd, for I found he had no hand in taking away the Quadrant, and that there was almost a Certainty of getting it again. I met Mr. Banks and Mr.
From Ratisbon he passed to Saalfeld, and thence to Wittemburg, where he saw the parallactic instruments and the wooden quadrant which had been used by John Pratensis in determining the latitude of the city, and in measuring the altitudes of the new star.
If he had been equipped with a modern quadrant and Greenwich chronometers he could not have made a quicker voyage nor a more exact landfall. It will be remembered that he had been obliged to hurry away from Espanola without visiting the islands of the Caribs as he had wished to do.
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