 | James Pollard Espy - Storms - 1841 - 620 pages
...is variable accordingly as there is more or less vapor in the air, is called the " dew point," and the difference between the dew point and the temperature of the air in degrees, is called the complement of the dew point.1 (117,118,129.) It is manifest, that if the... | |
 | 206 pages
...is variable accordingly as there is more or less vapour in the air, is called the " dew-point," and the difference between the dew point and the temperature of the air in degrees is called the complement of the dew-point.* It is manifest, that if the air at the surface... | |
 | Medicine - 1848 - 544 pages
...much relied on. In all the trials which were made during the winter of 1846—47, they showed that the difference between the dew point and the temperature of the air was generally at least 4 or 5 degrees, and in many cases more; thus indicating that the air was not... | |
 | 1849 - 1118 pages
...that the dew will begin to fall at sundown, and it appears from observation, that at Philadelphia, the difference between the dew point and the temperature of the air, at 4 p. M., is, on the average, about equal to the entire average nocturnal loss of temperature, and... | |
 | Archibald Tucker Ritchie - Cosmogony - 1850 - 678 pages
...depending on the number of degrees which the dew point is below the temperature of the air ; .... and the difference between the dew point and the temperature of the air is called the complement of the dew point."f • Principles of Meteorology, Hutchinson, pp. 17, 21,... | |
 | Alexander Fisher Olmsted - Chemistry - 1851 - 344 pages
...stand indicates the temperature of the air. The comparison of these two thermometers, therefore, gives the difference between the dew point and the temperature of the air. 38. Water may be frozen in the vacuum of an air pump, as well as in that produced by the condensation... | |
 | Agriculture - 1862 - 588 pages
...degrees. Then the air must be cooled to that extent to cause it to deposit moisture, or to rain. If the difference between the dew point and the temperature of the air is but a few degrees, there is a high probability that rain will soon fall. If the observations are... | |
 | George Ripley, Charles Anderson Dana - Encyclopedias and dictionaries - 1874 - 838 pages
...observations made each day at the Cooper institute, for the Smithsonian institution, by Prof. Morris: The difference between the dew point and the temperature of the air is called the complement of the dew point. From numerous observations which have been made with Daniell's... | |
 | Alfred Payson Gage - Physics - 1882 - 446 pages
...according to its location, dew, fog, or cloud. The atmosphere is said to be dry or humid, according as the difference between the dew point and the temperature of the atmosphere is great or little. QUESTIONS. 1. Why does our breath produce a cloud in winter and not... | |
 | S. S. Bassler - Weather - 1883 - 106 pages
...The height to which the air must ascend before it will become cold enough to form cloud, depends upon the difference between the dew point and the temperature of the air. If the dew point be ten degrees below the temperature of the air, cloud will begin to form when the... | |
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It is manifest that if the air at the surface of the earth should at any time be cooled down a little below the dew point, it would form a fog by condensing a small portion of its transparent vapor into little fine particles of water, and if it... 