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" By the barometric light, as it is called, or flashes of electric light in the Torricellian vacuum, produced by the friction of the mercury against the glass, when the column is made to oscillate through an inch or two in the dark ; 3. "
Pneumatics - Page 37
by Charles Tomlinson - 1848
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Pneumatics: For the Use of Beginners ...

Charles Tomlinson - Pneumatics - 1852 - 158 pages
...platinum was added to the open end, which has since preserved the instrument from deterioration. 22. As the excellence of a barometer chiefly depends on...the mercury is made to strike the top of the tube. If air be present in the tube, it will form a cushion at the top, and prevent, or greatly modify, this...
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Cyclopędia of useful arts & manufactures, ed. by C. Tomlinson. 9 divs, Volume 1

Cyclopaedia - 1852 - 258 pages
...secondly, by what is called the barometric tigU, or flashes of electric light in the Torricellian vacunm, produced by the friction of the mercury against the...through an inch or two in the dark; thirdly, by a elicking sound produced by the mercury striking the top of the tube when the column is made to oscillate....
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Pneumatics for the Use of Beginners

Charles Tomlinson - Pneumatics - 1854 - 156 pages
...mercurial column, and the absence of any flaw, speck, or dulness of surface; secondly, by the bwometrie light, as it is called, or flashes of electric light...the mercury is made to strike the top of the tube. If air be present in the tube, it will form a cushion at the top, and prevent, or greatly modify, this...
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Appleton's Dictionary of Machines, Mechanics, Engine-work, and ..., Volume 1

Engineering - 1873 - 1082 pages
...column, and the absence of any flaw, speck or dulness of surface ; tecondly, by the barometric ligltt, as it is called, or flashes of electric light in the...made to oscillate through an inch or two in the dark ; l/iir<ll>/, by a peculiar clicking sound, produced when the mercury is mode to strike the top of...
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Appletons' Cyclopędia of Applied Mechanics: A Dictionary of ..., Volume 1

Park Benjamin - Mechanical engineering - 1878 - 994 pages
...of any flaw, speck, or dullness of surface ; 2. By the barometric light, as it is called, or Sashes of electric light in the Torricellian vacuum, produced...made to oscillate through an inch or two in the dark; 3. By a peculiar clicking sound, produced when the mercury is made to strike the top of the tube. If...
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Appletons' Cyclopędia of Applied Mechanics: A Dictionary of ..., Volume 1

Park Benjamin - Mechanical engineering - 1880 - 1090 pages
...mercurial column, and the absence of any flaw, speck, or dullness of surface ; 2. By the barometric liffhl, as it is called, or flashes of electric light in the...made to oscillate through an inch or two in the dark ; 3. By a peculiar clicking sound, produced when the mercury is made to strike the top of the tube....
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Appletons' Cyclopędia of Applied Mechanics: A Dictionary of ..., Volume 1

Park Benjamin - Mechanical engineering - 1884 - 1002 pages
...brightness of the mercurial column, and the absence of any flaw, speck, or dullness of surface ; 2. By the barometric light, as it is called, or flashes...made to oscillate through an inch or two in the dark ; 3. By a peculiar clicking sound, produced when the mercury is made to strike the top of the tube....
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