PhysicsAppleton, 1878 - 149 páginas |
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Página 34
... bell - jar . Now I will ex- haust the bell - jar , that is to say , take its air out , and what is the result ? There is air in the india - rubber ball , but there is now none round about it , and in consequence the air in the ball ...
... bell - jar . Now I will ex- haust the bell - jar , that is to say , take its air out , and what is the result ? There is air in the india - rubber ball , but there is now none round about it , and in consequence the air in the ball ...
Página 41
... bell- jar full of air , which fits tightly upon a plate . You see too coming out from the middle of the plate a tube which opens into the bell - jar on the left side , and into the cylinder or barrel on the right , and thus connects the ...
... bell- jar full of air , which fits tightly upon a plate . You see too coming out from the middle of the plate a tube which opens into the bell - jar on the left side , and into the cylinder or barrel on the right , and thus connects the ...
Página 42
... bell - jar will succeed better , for it will rush through the tube and press open the lower valve which opens upwards , and then get into the empty space . Let us now suppose that we have got the piston to the top of the cylinder , and ...
... bell - jar will succeed better , for it will rush through the tube and press open the lower valve which opens upwards , and then get into the empty space . Let us now suppose that we have got the piston to the top of the cylinder , and ...
Página 43
... bell - jar . Of course it is quite necessary in working the pump that the piston shall fit quite tightly into the cylinder ; for , if not , the air will get in from without , and therefore we shall not succeed in getting the air out ...
... bell - jar . Of course it is quite necessary in working the pump that the piston shall fit quite tightly into the cylinder ; for , if not , the air will get in from without , and therefore we shall not succeed in getting the air out ...
Página 48
... bell , and under this head we shall tell you something about sound . We shall next speak about heated bodies , and under this head tell you something about light and heat ; and lastly , when speaking about electrified bodies , you will ...
... bell , and under this head we shall tell you something about sound . We shall next speak about heated bodies , and under this head tell you something about light and heat ; and lastly , when speaking about electrified bodies , you will ...
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acid air-pump attracted BALFOUR STEWART battery blow boiling-point bottom brass bright bulb bulk for bulk buoyancy burning-glass called cannon cold colours conductor convection copper cubic inches cylinder Describe an experiment E. A. FREEMAN earth elec electric machine electroscope excited glass excited sealing-wax expand experiment showing fact feet fill fire force gases Give an instance glass support grains gravity heated body hot body Illustrate your reply iron kinds of electricity knob latent heat lens Leyden jar liquid magnify means mercury metal mirror motion move needle nitric acid particles pass phosphorus piston pith ball plate platinum positive electricity pound weight pressure Price Primer prism ray of light rise rubbed scale-pan Sketch solid sound spark steam stoneware strikes substance sulphuric acid surface temperature thermometer thing told tricity tube valve vapour velocity vessel vibrating body weight wire zinc