Proceedings of the American Academy of Arts and Sciences, Volumen15Metcalf and Company, 1880 Vol. 12 (from May 1876 to May 1877) includes: Researches in telephony / by A. Graham Bell. |
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abacus absolute acheniis air thermometer alcohol ammonia amount apparatus architrave astragal boiling Boston bracteis bromine bulb Calculated calorimeter Cambridge capital capitulis carbonic cent Choisy-le-Roi chronograph cm.³ coefficient color column compared comparison constant corolla correction crystals curve determined diameter dimethyluric Egyptian error experiments foliis formula gave Geissler give glass H₂O Hence hydrate hydrochloric acid Ibid ignition inch involucro jacket Joule Kilogramme length Lepsius light longis lotus magnesic chloride mixture magnesic sulphate mixture mean measured mercurial thermometer meters method Mètre mometer N. S. VII Na,O nearly nitric acid oblongis observations obtained P₂O paper pappo papyrus phosphate phosphoric oxide pier plate platinum plinth potassic precipitate present Professor radiation Regnault salt San Luis Potosi scale SECTION shaft Siemens unit sodic soluble solution specific heat standard stem surface TABLE temperature tion toluol torsion tube tungstate weight yard
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Página 273 - For information of this kind, the reader is referred to the references at the end of this paper.
Página 274 - 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...
Página 274 - 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...
Página 19 - So far as I am aware, no attempt has been made to agitate coarse sand.
Página 308 - Narrative of the Origin and Formation of the International Association for obtaining a Uniform Decimal System of Measures, Weights, and Coins.
Página 323 - 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.
Página 389 - ... 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...
Página 349 - I could, and discover the causes of the distemper ; but it is easier to say what it is not, than what it is.
Página 380 - 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,...
Página 293 - 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...