The climate of the United States and its endemic influences. Based chiefly on the records of the Medical Department and Adjutant General's Office, United States Army / By Samuel Forry.
- Samuel Forry
- Date:
- 1842
Licence: Public Domain Mark
Credit: The climate of the United States and its endemic influences. Based chiefly on the records of the Medical Department and Adjutant General's Office, United States Army / By Samuel Forry. Source: Wellcome Collection.
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![are once more in opposite directions. Hence it follows that latitude alone constitutes a very uncertain index of the character of climate 3 for, as has been abundantly demonstrated, although two places may have the same mean annual temperature, and thus be on the same zsothermal. line, yet as the seasons of one may be nearly uniform and pondingly different. As these annual details in the ‘“‘ Army Meteor- ological Register,” merely illustrate the meteorological phenomena already sufficiently demonstrated, it is deemed sufficient to present here a condensed view of all the results.. Table[B.] on the opposite page exhibits the modifying influence of the sea-coast compared with the inte- rior remote from the agency of inland seas, based on an average of five years and calculated from the data of two posts in each system of climate, the mean latitude of the posts on the ocean being 43° 18’, and that of those in the opposite locality, 43° 10’. On the ocean, the mean temperature of winter is 6°.05 higher than in the latter locality ; that of spring is 4°.13 lower ; that of summer is 8°.71 lower; and that of autumn is 0°.40 lower. But this contrast mean temperature of winter and summer, it being on the sea-coast between the mean temperature of winter and spring, the former be- ing only 16°.84, whilst the latter is 279.02 ; as well as by the differ- ence in the extreme range of the thermometer, the former being 122° and the latter 134°. ‘That a classification of climates having for its basis mere latitude, is wholly inadmissible, is thus most conclusively demonstrated ; for although there may be little difference in the mear annual temperature on the same parallel, yet the distribution of heat among the seasons may be extraordinarily unequal. These facts are illustrated in an equally marked degree iv Table [C] on the following page, which exhibits a comparison be- tween posts on the lakes and those of the same see situated be- yond their influence. It thus appears that the winter of the former, notwithstanding it is 1° 46’ north of the latter, has a mean temperature 2°.54 higher, whilst that of summer is 10°.40 lower. In the latter, the mean tem- perature of spring is 6°.65 higher, and that of autumn is 2°.04 higher. The difference between the mean temperature of summer and winter, making due allowance for difference of latitude, is even greater than in the comparison with the Atlantic coast, that of the Lakes being 43°, and that of the opposite locality 55°.84. Between vay 76](https://iiif.wellcomecollection.org/image/b33288379_0050.jp2/full/800%2C/0/default.jpg)
