 | Ira Osborn Baker - 1893 - 430 頁
...and glass, and not easily injured ; but when hung up, a sudden jolt might send a bubble of air into the vacuum at the upper end of the tube, and the instrument would be useless until refilled." * ART. 2. ANEROID BAROMETERS. 340. The aneroid barometer consists of a cylindrical metallic... | |
 | United States. War Department - 1870 - 372 頁
...and glass, and not easily injured; but when hung up, a sudden jolt might send a bubble of air into the vacuum at the upper end of the tube, and the instrument would be useless until repaired. If the cistern should become dirty it can be cleaned with safety, and without changing, in the slightest... | |
 | United States. Congress. House - 1871 - 388 頁
...and glass, and not easily injured ; but when hung up, a sudden jolt might send a bubble oí air into the vacuum at the upper end of the tube, and the instrument would be useless until repaired. If the cistern should become dirty it can be cleaned with safety, and without changing, in the slightest... | |
 | United States. War Department - 1873 - 1262 頁
...and glass — and not easily injured, bnt when hung up a sudden jolt might send a bubble of air into the vacuum at the upper end of the tube, and the instrument...would be useless until repaired. Observers must never siring the barometer or endeavor to force the mercury against the top of the tube without first screwing... | |
 | United States. Congress. House - 1873 - 1004 頁
...upper <ni <• tnbe, nnd the instrument would be useless until repaired. Observers must never tint; t> barometer or endeavor to force the mercury against the top of the tnbe without first serfs in}; up tlic large adjusting screw at the base of the cistern. If tin: cistern... | |
 | United States. Congress. House - 1874 - 1302 頁
...and glass — and not easily injured, but when bung up a sniWeu j»lt might send a bubble of air into the vacuum at the upper end of the tube, and the instrument would bo useless until repaired. Observers must never Hieing the barometer or endeavor to force the mercury... | |
 | United States. War Department - 1879 - 1068 頁
...upper end of the tube, and tho instrument become useless until repaired. Observers must never »wing the barometer or endeavor to force the mercury against the top of the tube without first screwing up tho large adjusting screw at the base of the cistern. 40. If the cistern should become dirty, it can... | |
 | Edmund Alexander Parkes - 1883 - 580 頁
...and not easily injured ; but when hung up (in position) a sudden jolt might send a bubble of air into the vacuum at the upper end of the tube, and the instrument become useless until repaired. Observers must never swing the barometer or endeavor to force the mercury... | |
 | Edmund Alexander Parkes - 1883 - 578 頁
...and not easily injured ; but when hung up (in position) a sudden jolt might send a bubble of air into the vacuum at the upper end of the tube, and the instrument become useless until repaired. Observers must never swing the barometer or endeavor to force the mercury... | |
 | 1886 - 542 頁
...and glass, and not easily injured ; but when hung up, a sudden jolt might send a bubble of air into the vacuum at the upper end of the tube, and the instrument would be useless until repaired.''* § 11. Reading the Barometer. — Bead the attached thermometer first ; it is more sensitive than the... | |
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... while screwed up, gently inverted and hung up, when it can be unscrewed. While it has its cistern uppermost, the tube is full — is one solid mass of metal and glass— and not easily injured ; but when hung up, a sudden jolt might send a bubble... 
