J. D. Everett on Reducing Observations of Temperature. 17 
Art. IL.—Description of a method of Reducing Observations of 
Temperature ; by Professor J. D. KvERETT, of Kings College, 
Windsor, Nova Scotia. 
THE climate of a place, as regards temperature, involves’ three 
principal elements—mean temperature—range—and date of phase, 
using this last term to denote the earliness or lateness of the 
Seasons generally, as regards temperature. 
he first of these elements js subjected to measurement by 
nearly all meteorological: observers; the other two, and espe- 
cially the third, have not received equal attention. These three 
elements appertain alike to daily and to annual variations, but 
we shall confine our remarks to the latter. 
of cold ones, and the error will (in proportion to the deduced 
Tange) be as great as in comparing single months. — 
The element of “date” which thus interferes with the deter- 
Mination of range from monthly means, is, for its own sake, well 
Worthy of careful investigation; but meteorologists gen rally 
€ propose to describe a method of deducing both “range” 
din the article above mentioned, was not thence 
ved, but was based on a more elaborate method employed by 
Am. Jour. Sc1.—Seconp Szrres, VoL. XXXV, No. 103,—Jan., 1863, 
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