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Optical Sights for Rifles - Nature
Nature· 1 day agoOF all instruments needing accurate pointing, the rifle has been longest deprived of the aid of optical appliances. Probably this is due to a variety of ...
A Rapid Visual Test for Vitamin A Deficiency - Nature
Nature· 1 day agoTHE recovery of vision after blinding by a bright light depends, among other things, on a reformation of visual purple from vitamin A in the blood. Various instruments have ...
Weights and Measures Regulations - Nature
Nature· 1 day agoUNDER the Weights and Measures Act, the Board of Trade is required to make regulations with respect to weights, measures, and weighing and measuring < ...
A Student's Drum Recorder 1 - Nature
Nature· 1 day agoTHIS admirable instrument consists of five parts easily detachable, viz. The special novelty of the instrument lies in the driver, which is so constructed ...
[Letters to Editor] - Nature
Nature· 1 day agoThe apparatus used was simply the orthodox loose coupling with crystal detector. The bed used is on the second floor of my house, about 20 ft. from the ground, and the gas-pipe below the same ...
Pyrometers and Pyrometry - Nature
Nature· 1 day agoThe extent to which pyrometers are now employed may be gauged from the fact that one armament firm alone has six hundred instruments in daily use ...
Is Freeport-McMoRan Inc. (NYSE:FCX) Trading At A 45% Discount?
Simply Wall St. via Yahoo Finance UK· 21 hours agoIn the final step we divide the equity value by the number of shares outstanding. Compared to the...
American Indian Weapons - Nature
Nature· 1 day agoIt would be interesting if it could be ascertained how such a peculiar instrument as that described by your correspondent came to be used as a weapon of ...
Research in Terrestrial Magnetism 1 - Nature
Nature· 1 day agoTHE handsomely printed and illustrated volume before us records the activity of the Department of Terrestrial Magnetism by land from 1911 to 1913. In pp. 5–20 we have an account ...
Summaries of Addresses of Presidents of Sections. Some Developments in Astronomical Instruments -...
Nature· 1 day agoSIR HAROLD SPENCER JONES opens his presidential address to Section A (Mathematics and Physics) by pointing out that, until far into the eighteenth century, astronomical observations ...
