Mining Engineers' Handbook, Volume 2Robert Peele, John Adams Church J. Wiley & sons, Incorporated, 1941 |
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Halaman 23-23
... lamps the following are representative . The Davy lamp , invented in 1815 by Sir Humphry Davy , was the first safety lamp ; now superseded . Its oil flame is surrounded and separated from the external air by a wire gauze mantle ( 6 in ...
... lamps the following are representative . The Davy lamp , invented in 1815 by Sir Humphry Davy , was the first safety lamp ; now superseded . Its oil flame is surrounded and separated from the external air by a wire gauze mantle ( 6 in ...
Halaman 23-25
... lamps in 10 hr generally ranges from 500 to 700 gm . A lamp of the Wolf type with flat wick uses about 738 gm benzene . Table 9. Characteristics of Representative Safety Lamps Name Oil used Air entering with reference to flame Combus ...
... lamps in 10 hr generally ranges from 500 to 700 gm . A lamp of the Wolf type with flat wick uses about 738 gm benzene . Table 9. Characteristics of Representative Safety Lamps Name Oil used Air entering with reference to flame Combus ...
Halaman 23-27
... lamps now used are the Edison and Wheat , and there are 15 types of hand elec lamps on the permissible list , including a flood light and a pneumatic elec semi - portable lamp ( 91 ) . Hand elec lamps are used in the US for special ...
... lamps now used are the Edison and Wheat , and there are 15 types of hand elec lamps on the permissible list , including a flood light and a pneumatic elec semi - portable lamp ( 91 ) . Hand elec lamps are used in the US for special ...
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COMPRESSED | 15 |
Applications Definitions Data | 15-44 |
Accident Compensation Pensions | 16-1 |
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