 | Colin Macfarquhar, George Gleig - Encyclopedias and dictionaries - 1797 - 450 pages
...difference of the barometric heights in tenths of an inch. Call this d. 2. Multiply the difference a between 32, and the mean temperature of the air by 21, and take the fum or difference of this produit and 87 feet. This is the height through which we muft rife... | |
 | John Bonnycastle - Trigonometry - 1806 - 464 pages
...difference of the barometric heights," in tenths of an inch, and multiply the result by 3O. 2 E 418 2. Multiply the difference between 32° and the mean temperature of the air, by .21, and take the sum or difference of this product and 87 feet, according as the temperature is above or below... | |
 | Olinthus Gregory - Mechanical engineering - 1815 - 604 pages
...difference of the barometric heights in tenths of an inch. Call this i>. II. Multiply the difference d between 32° and the mean temperature of the air by -21 , and take the sum or difference of this product and 87 feet. This is the height through which we must rise... | |
 | John Robison - Astronomy - 1822 - 852 pages
...Difference of the barometric heights in tenths of an inch. Call this d. 2. Multiply the difference a between 32, and the mean temperature of the air by 21, and take the sum or difference of this product and 87 feet. This is the height through which we must rise... | |
 | Thomas Keith - 1839 - 498 pages
...correct elevation. Then E= 30p (87±'21rf)±2-833 8. m This formula may be given in words, thus : (188) 1. Multiply the difference between 32° and the mean...difference, between the barometric heights, in tenths H of inches, and divide the product by the mean of the barometric heights, the quotient will give the... | |
 | William Templeton - 1865 - 178 pages
...find the height of a mountain by the Barometer. RULE 1. — Multiply the difference between 32° Fah. and the mean temperature of the air by -21, and add...temperature be above 32°, but subtract it if below. RULE 2. — Multiply the sum or difference as found above by thirty times the difference between the... | |
 | Emory Edwards - 1895 - 440 pages
...find the height of a mountain by the Barometer. RULE 1. — Multiply the difference between 32° Fah. and the mean temperature of the air by -21, and add...temperature be above 32°, but subtract it if below. BULB 2. — Multiply the sum or difference as found above by thirty times the difference between the... | |
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Multiply the difference a between 32, and the mean temperature of the air by 21, and take the sum or difference of this product and 87 feet. This is the height through which we must rise to cause the barometer to fall from 30 inches to 29,9. 