Proceedings of the American Academy of Arts and Sciences, 第 15 巻

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Metcalf and Company, 1880
Vol. 12 (from May 1876 to May 1877) includes: Researches in telephony / by A. Graham Bell.
 

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273 ページ - For information of this kind, the reader is referred to the references at the end of this paper.
274 ページ - 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...
274 ページ - 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 same straight line or distance between the centres of the said two points in the said gold studs in the said brass rod, the brass being at the temperature of 62 ° of Fahrenheit's thermometer, shall be and is hereby denominated the "Imperial Standard yard...
19 ページ - So far as I am aware, no attempt has been made to agitate coarse sand.
308 ページ - Narrative of the Origin and Formation of the International Association for obtaining a Uniform Decimal System of Measures, Weights, and Coins.
323 ページ - Beni-Hassan, from which it is most indubitably copied. As a work of art, it fails from excess of strength, a fault common to most of the efforts of a rude people, ignorant of their own resources, and striving, by the expression of physical strength alone, to obtain all the objects of their art.
389 ページ - ... according to which all changes of the wind, not local and transitory, followed each other, not at random, but in a regular order, which is reversed for the southern hemisphere. This law declares, in popular language, that there is no permanent change of weather if the wind backs round. Bacon in...
349 ページ - I could, and discover the causes of the distemper ; but it is easier to say what it is not, than what it is.
380 ページ - Philadelphia, and after taking his degree in Arts at the University of Pennsylvania, in 1815, he entered his father's counting-room, and was for a time engaged in the East India trade. But he soon found this uncongenial work, and, leaving the office, he again entered the University and took his degree in medicine in 1820. In 1827 he was appointed on the editorial staff of the Philadelphia Journal of the Medical and Physical Sciences, which afterward became the American Journal of Medical Sciences,...
293 ページ - It was also recognized as a desirable principle, that the bar should be subject to as little strain as possible, and, therefore, that it should be supported at numerous points. Great facility is given to the arrangements for supporting a bar with definite pressures applied at special points, by the use of levers. Thus, if any portion of the bar rest upon two rollers which are placed at the ends of a lever, and if the fulcrum of a lever (whether movable or not) be in its centre, the pressures upwards...

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