AMERICAN JOURNAL OF SCIENCE. 
[THIRD SERIES.] 
Art. I— Contributions to Meteorology ; by Eti1as Loomis, Pro- 
fessor of Natural Philosophy in Yale College. Twentieth 
paper. With Plates I and II. 
[Read before the National Academy of Sciences, Nov. 13, 1883, and April 15, 1884.] 
Reduction of Barometric observations to sea-level. 
In my fifteenth paper of contributions to Meteorology, I 
endeavored to determine the proper reduction to sea-level of 
pressure near either of these five stations. Table I shows > 
Washington during a period of three years. Column first gives 
__ the number of reference; column second the date of the barome- 
_ tric minimum; and column third gives the height of the 
barometer at sea-level deduced from the observations at Bur- 
lington, Vt. and Portland, Me. The distance of Mt. Washing- __ 
Am. Jour. Scl.—Turrp Serres, VoL. XXVIII. No. 163.—Juzy, 1884. 
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