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Books Books 1 - 10 of 11 on ... the wet bulb will be changed every month, and the bulb carefully cleaned. The....
" ... the wet bulb will be changed every month, and the bulb carefully cleaned. The cover may be washed as often as necessary, without removal, by means of a jet of clean water from a small syringe. When the temperature of the air is below the... "
Practical instructions - Page 8
1884
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Directions for meteorological observations, and the registry of periodical ...

Smithsonian Institution, Arnold Guyot, Joseph Henry - Meteorology - 1858 - 70 pages
...covering should be changed every two or three months, and the bulb cleaned. [The linen may be washed, without removal, by means of a jet of clean water from a small syringe.] Observation. — For the observation, take first a small vessel full of water, which should be left...
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Annual Reports ...., Volume 1

United States. War Dept - 1871
...cover of the wet-bulb will be changed every two mouths, and the bulb carefully cleiined. The muslin may be washed as often as necessary, without removal, by means of a jet of clean water from a smull syringe. When the temperature of the air is below the freezing-point, the water will be erhptied...
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Smithsonian Miscellaneous Collections, Volume 1

Science - 1862
...covering should be changed every two or three months, and the bnlb cleaned. [The linen may be washed, without removal, by means of a jet of clean water from a small syringe.] Observation. — For the observation, take first a small vessel full of water, which should be left...
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Annual Reports ...., Volume 1

United States. War Department - 1873
...freezing point, and the cover of the wet bulb will be changed every month, and the bulb carefully cleaned. The cover may be washed as often as necessary, without...syringe. When the temperature of the air is below the freezing point the water will be emptied from the cistern, and in making an observation the wet...
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Annual report of the chief signal-officer, to the secretary of war, Volume 2

United States signal office - 1873
...freezing point, and the cover of the wet bulb will be changed every month, and the bulb carefully cleaned. The cover may be washed as often as necessary, without removal, by means of a jet of clean water from a smal syringe. When the temperature of the air is below the freezing point, the water will be emptied...
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House Documents, Otherwise Publ. as Executive Documents ..., Volume 2, Part 1

United States - 1873
...the •*' ^ . will be changed every mouth, mid the bulb carefully cleaned. The cover my bf ib-1 as often as necessary, without removal, by means of a jet of clean water from >n syringe. Wheu the temperature of the air is below the freeziug point, the water will be emptied...
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House Documents, Otherwise Publ. as Executive Documents ..., Volume 2, Part 1

United States - 1874
...the •' bulb will be changed every month, and the bulb carefully cleaned. The cover may '" bed as often as necessary, without removal, by means of a jet of clean water m i inull syringe. "Ьто the temperature of the air is below the freezing point tho water will...
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House Documents, Otherwise Publ. as Executive Documents: 13th ..., Volume 6

United States - 1878
...cleaned. The cover can bo kept clean by washing it (without removal) by nse of а jet of water thrown from a small syringe. When the temperature of the air is below the freezing-point the water will b emptied from the cistern and the bulb moistened with water. By...
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Annual Report of the Secretary of War, Volume 4

United States. War Dept - 1879
...freezing-point, and the cover of the wet bulb will be changed every month and the bulb carefully cleaned. The cover may be washed as often as necessary, without...of a jet of clean water from a small syringe. When tjie temperature -of the air is be-low the freezing-point, the water will be emptied from the cistern,...
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Report of the Chief Signal Officer, United States Army, to the Secretary of War

United States. Army. Signal Corps - 1880
...freezing-point, and the cover of the wet bulb will lie changed every month aud the bulb carefnllv cleaned. The cover may be washed as often as necessary, without removal, by mean of a, jet of clean water from a small syringe. When the temperature of the air is below the...
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