The Romance of Modern Exploration: With Descriptions of Curious Customs, Thrilling Adventures and Interesting Discoveries of Explorers in All Parts of the World

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Seeley, 1908 - 383 pagine
 

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Pagina 241 - I fixed a leathern trunk or hose well liquored with bees wax and oil, and long enough to fall below the bung-hole, being kept down by a weight appended : so that the air in the upper part of the barrels could not escape, unless the lower ends of these hose were first lifted up.
Pagina 32 - Yard, when compared with a Pendulum vibrating Seconds of Mean Time in the Latitude of London in a Vacuum at the Level of the Sea, is in the proportion of Thirty-six Inches to Thirty-nine Inches and one thousand three hundred and ninety-three ten-thousandth Parts of an Inch.
Pagina 59 - the whole of the machinery was executed by hand. There were neither planing, slotting, nor shaping machines, and with the exception of very imperfect lathes and a few drills, the preparatory operations of construction were effected entirely by the hands of the workmen.
Pagina 7 - The Romance of Modern Electricity. Describing in non-technical language what is known about electricity and many of its interesting applications. With Forty-one Illustrations. Ex. crown Svo, 51. " Admirable . . . clear, concise.
Pagina 76 - So completely was the hammer now under control, that it became a favourite amusement to place a wine-glass containing an egg upon the anvil, and let the block descend upon it with its quick motion ; and so nice was its adjustment, and so delicate its mechanism, that the great block, weighing perhaps several tons, could be heard playing tap, tap, upon the egg without even cracking the shell, when, at a signal to the man in charge, down would come the great mass, and the egg and glass would be apparently,...
Pagina 184 - And yet it is as certain as anything of the kind can be, that there...
Pagina 32 - Yard hereby declared to be the Imperial Standard Yard, when compared with a Pendulum vibrating Seconds of Mean Time in the Latitude of London in a Vacuum at the Level of the Sea is in the...
Pagina 32 - Yard 1760" are engraved, shall be, and the same is hereby declared to be, the original and genuine standard of that measure of length or lineal extension called a yard ; and that the...
Pagina 63 - Simple and outwardly unimportant as this appendage to lathes may appear, it is not, we believe, averring too much to state that its influence in improving and extending the use of machinery has been as great as that produced by Watt's improvements of the steam-engine itself. Its introduction went at once to perfect all machinery, to cheapen it, and to stimulate invention and improvement.
Pagina 242 - ... bottoms when foul, in calm weather at sea. I shall only intimate that, by an additional contrivance, I have found it not impracticable for a diver to go out of an engine to a good distance from it, the air being conveyed to him with a continued stream by small flexible pipes, which pipes may serve as a clue to direct him back again when he would return to the belL" We have italicised certain words to draw attention to the fact that Dr.

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