Download PDF, EPUB, Kindle Van Nostrand's Chemical Annual Volume 4
Download PDF, EPUB, Kindle Van Nostrand's Chemical Annual Volume 4
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Author: T R LeCompte
Number of Pages: 128 pages
Published Date: 01 Mar 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
ISBN: 9781130477665
Download Link: Van Nostrand's Chemical Annual Volume 4
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 Excerpt: ...I-(0.000181-/3) t.l; U = I-0.000181 t.l + (-fi.t.l) = i-(0.000181-0) a. With a brass scale, this correction will be: (0.000181-0.000019) = 0.000162 l.t. With a glass scale, this correction will be: (0.000181-0.000008) = 0.000173 l.t. These latter values may be taken from tables. This correction will amount, under ordinary barometric conditions, to about 1/8 mm. per degree centigrade, and for general purposes the result will frequently be sufficiently accurate, if 1/8 mm.i be deducted from the barometric reading. 3. Capillary Depression.--This varies with the different instruments. The correction is generally supplied, for any particular instrument, by the manufacturer. The wider the tube of the barometer, the less will be the error due to capillary depression. This correction will amount, at most, to 0.1 mm., where the diameter of the barometer tube is 15 mm. 4. Vapor Pressure of Mercury.--This amounts to 0.001 mm. at 20 C, and to 0.01 at 40 C. To compensate for the vapor pressure of mercury, it will be sufficient to add to the reading of the barometer 0.001 mru.t. 5. Influence of Gravity.--Reduction to conditions in latitude 45. The pressure of one and the same column of mercury at different latitudes is proportional to gravity. The pressure of a column of mercury, at sea level, that would be in equilibrium with the pressure of the air would be: At the poles, 983.2 X 13.596 X 760 dynes/cm.2, at 45 latitude, 980.6 X 13.596 X 760 dynes/cm.2, and at the equator, 978.1 X 13.596 X 760 dynes/cm.2 Thus we see that the specific gravity and the height of the column of mercury remaining the same, the pressure depends upon gravity. Thus, at the equator, the effective pressure is, in the ordinary system of nomenclature, (978.1/980.6) 760 X 13.596 grams/cm.2, at latitu...
Read online Van Nostrand's Chemical Annual Volume 4 Buy Van Nostrand's Chemical Annual Volume 4 Download Van Nostrand's Chemical Annual Volume 4 for pc, mac, kindle, readers Download to iPad/iPhone/iOS, B&N nook Van Nostrand's Chemical Annual Volume 4 ebook, pdf, djvu, epub, mobi, fb2, zip, rar, torrent
Van Nostrand's Chemical Annual Volume 4. T R LeCompte
Author: T R LeCompte
Number of Pages: 128 pages
Published Date: 01 Mar 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
ISBN: 9781130477665
Download Link: Van Nostrand's Chemical Annual Volume 4
---------------------------------------------------------------
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 Excerpt: ...I-(0.000181-/3) t.l; U = I-0.000181 t.l + (-fi.t.l) = i-(0.000181-0) a. With a brass scale, this correction will be: (0.000181-0.000019) = 0.000162 l.t. With a glass scale, this correction will be: (0.000181-0.000008) = 0.000173 l.t. These latter values may be taken from tables. This correction will amount, under ordinary barometric conditions, to about 1/8 mm. per degree centigrade, and for general purposes the result will frequently be sufficiently accurate, if 1/8 mm.i be deducted from the barometric reading. 3. Capillary Depression.--This varies with the different instruments. The correction is generally supplied, for any particular instrument, by the manufacturer. The wider the tube of the barometer, the less will be the error due to capillary depression. This correction will amount, at most, to 0.1 mm., where the diameter of the barometer tube is 15 mm. 4. Vapor Pressure of Mercury.--This amounts to 0.001 mm. at 20 C, and to 0.01 at 40 C. To compensate for the vapor pressure of mercury, it will be sufficient to add to the reading of the barometer 0.001 mru.t. 5. Influence of Gravity.--Reduction to conditions in latitude 45. The pressure of one and the same column of mercury at different latitudes is proportional to gravity. The pressure of a column of mercury, at sea level, that would be in equilibrium with the pressure of the air would be: At the poles, 983.2 X 13.596 X 760 dynes/cm.2, at 45 latitude, 980.6 X 13.596 X 760 dynes/cm.2, and at the equator, 978.1 X 13.596 X 760 dynes/cm.2 Thus we see that the specific gravity and the height of the column of mercury remaining the same, the pressure depends upon gravity. Thus, at the equator, the effective pressure is, in the ordinary system of nomenclature, (978.1/980.6) 760 X 13.596 grams/cm.2, at latitu...
Read online Van Nostrand's Chemical Annual Volume 4 Buy Van Nostrand's Chemical Annual Volume 4 Download Van Nostrand's Chemical Annual Volume 4 for pc, mac, kindle, readers Download to iPad/iPhone/iOS, B&N nook Van Nostrand's Chemical Annual Volume 4 ebook, pdf, djvu, epub, mobi, fb2, zip, rar, torrent