Elements of Physics: Or Natural PhilosophyD. Appleton, 1887 - 873 páginas |
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Página 2
... metal into globules so small that they lose their bright lustre and become grey . When sublimed in a tube some of these have been measured and their lustre and opacity determined , when they did not exceed the 20,000th of an inch in ...
... metal into globules so small that they lose their bright lustre and become grey . When sublimed in a tube some of these have been measured and their lustre and opacity determined , when they did not exceed the 20,000th of an inch in ...
Página 12
... metals ; the intense heat also expels the air , which would serve to prevent contact in the cold state . In the art of soldering , by which metals are made to cohere , borax , sal ammoniac , and other fluxes are used for the purpose of ...
... metals ; the intense heat also expels the air , which would serve to prevent contact in the cold state . In the art of soldering , by which metals are made to cohere , borax , sal ammoniac , and other fluxes are used for the purpose of ...
Página 15
... metal . 34. It is the buoyancy given by the air contained in its pores that makes wood lighter than water ; for if a log of wood be exposed to the pressure of a great depth of ocean , its pores become filled with water , and it sinks as ...
... metal . 34. It is the buoyancy given by the air contained in its pores that makes wood lighter than water ; for if a log of wood be exposed to the pressure of a great depth of ocean , its pores become filled with water , and it sinks as ...
Página 17
... metal bismuth in an iron ladle . When the melted metal has solidified on the surface and at the sides , the fluid portion is poured away and the bismuth will be found crystallised in regular cubes striated on the surface . Sulphur may ...
... metal bismuth in an iron ladle . When the melted metal has solidified on the surface and at the sides , the fluid portion is poured away and the bismuth will be found crystallised in regular cubes striated on the surface . Sulphur may ...
Página 23
... metals ; it may be hammered until it is reduced in thickness to the 300,000th of an inch . In this state it is transparent to light , allowing the green rays to traverse it . For gold - beaters the metal is first formed into rods ...
... metals ; it may be hammered until it is reduced in thickness to the 300,000th of an inch . In this state it is transparent to light , allowing the green rays to traverse it . For gold - beaters the metal is first formed into rods ...
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Otras ediciones - Ver todas
Términos y frases comunes
action atmosphere atmospheric pressure axle balance ball balloon barometer beam blow body bottom bulk buoyancy called carbonic acid carriage cause centre of gravity centrifugal force chemical cohesion column common cork density diffusion direction distance earth effect elastic Energy equal fall feet float fluid friction gases glass gradually greater half heat heavy Hence horizontal hydrogen illustration inch inclined plane increase instance iron length less lever lift liquid machine mass matter mercury metal miles molecules momentum motion moving musical oxygen particles pass pendulum piston placed plane pound pound weight pressure principle produced proportion pulley quantity resistance rest rise rope round screw ship side simple machines solid sound space specific gravity stone string substance surface temperature tion tube turn uniform velocity velocity of sound vertical vessel vibrations waves weight wheel whole wind
Pasajes populares
Página 467 - ... will prevent the metal from running away, and in a few minutes it will cool and take the impression, without the slightest injury to the paper from which it was taken.
Página 799 - That the squares of the times of the revolutions of the planets are as the cubes of their mean distances from the sun.
Página 368 - When horses or mules march in company at night, those in front direct their ears forward...