Elements of Physics: Or Natural PhilosophyD. Appleton, 1880 - 873 páginas |
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Otras ediciones - Ver todas
Términos y frases comunes
air-pump animal atmospheric pressure axle balance ball balloon barometer beam body boiling bottom bulk called carbonic acid cause centre of gravity centrifugal force chemical cohesion cold column combustion common condensed cooled cork degree density depth diffusion direction distance earth effect elastic Energy equal expansion experiment Fahrenheit fall feet flame float fluid force freezing friction gases glass greater half heat heat-rays Hence hydrogen Hydrometer inch inclined plane increase intensity iron latent heat length less lever lift light liquid mass melting mercury metal miles motion moving musical nearly oxygen particles pass pendulum phosphorus pipe piston placed pound produced proportion quantity radiation resistance rise round scale ship side solid sound space specific gravity steam string substance surface temperature thermometer tion tube turn vapour velocity velocity of sound vessel vibrations warm waves weight wheel whole wind
Pasajes populares
Página 873 - ... that the cooperation of the most distinguished professors in England, Germany, France, and the United States, has been secured, and negotiations are pending for contributions from other eminent scientific writers. The works will be issued in New York, London, Paris, Leipsic, Milan, and St. Petersburg. The INTERNATIONAL SCIENTIFIC SERIES is entirely an American project, and was originated and organized by Dr. EL Youmans, who spent the greater part of a year in Europe, arranging with authors and...
Página 680 - ... polished wood, ivory, leather, or any other non-metallic substance. The first reflector, B; is known as the polarizer of the light, and the second, A, as the analyser. Each reflecting surface has its own angle of maximum polarizing effect ; and this is known as its polarizing angle. Sir David Brewster discovered that it bears a certain relation to the angle of refraction of the same substance ; the relation being such, that when a surface is placed with respect to a beam of light at its polarizing...
Página 379 - ... bar commences to oscillate to and fro, the swing gradually increasing in amplitude until the dead centre is passed over, when several complete revolutions are made. The torsion of the suspending fibre now offers resistance to the revolutions, and the bar commences to turn in the opposite direction. This movement is kept up with great energy and regularity as long as the candle burns. The author discusses the action of ice, or a cold substance, on the suspended index.
Página 873 - The character and scope of this series will be best indicated by a. reference to the names and subjects included in the subjoined list, from which it will be seen that the cooperation of the most distinguished professors in England, Germany, France, and the United States, has been secured, and negotiations are pending for contributions from other eminent scientific writers. The works will be issued in New York, London, Paris, Leipsic, Milan, and St.
Página 265 - ... have become quiet. The first swarm is accompanied by the old queen, and usually leaves the hive between ten o'clock in the morning and four o'clock in the afternoon on a fine day. Should the queen not join the bees when clustered, they will return to the old hive. Swarms- sometimes, although very rarely, are not inclined to cluster ; and when the bee-keeper perceives, that instead of clustering they rise higher and higher into the air, he should endeavour to arrest...
Página 281 - Chimnies quicken the ascent of hot air by keeping a long column of it together. A column of two feet high rises, or is pressed up with twice as much force as a column of one foot, and so in proportion for all other lengths; just as two or more corks strung together, and immersed in water, tend upwards with...
Página 211 - The velocity of waves has relation to their magnitude. The large waves just spoken of, proceed at the rate of from thirty to forty miles an hour. — It is a vulgar belief that the water itself advances with the speed of the wave, but in fact the...
Página 332 - Months afterwards it was ascertained, that at the time of observation the bells of the city of St. Salvador, on the Brazilian coast, had been ringing on the occasion of a festival: their sound, therefore, favoured by a gentle wind, had travelled over perhaps 100 miles of smooth water, and had been brought to a focus by the concave sail in the particular situation on the deck where it was listened to.
Página 211 - The common cause of waves," says Dr Arnott, ' is the friction of the wind upon the surface of the water. Little ridges or elevations first appear, which, by continuance of the force, gradually increase until they become the rolling mountains seen where the winds sweep over a great extent of water.
Página 398 - Thus, on heating together platinum and antimony in a spirit flame, the platinum, which is almost infusible, is readily melted, and forms an alloy with the antimony. There is a combination of three metals, which is remarkable in this respect, that it melts at the temperature of boiling water (212°). It is called fusible metal, and is composed of two parts of bismuth, one of lead, and one of tin. The lowest melting point of these three metals is that of tin, 442°. The melting points of some substances...