AMERICAN 
JOURNAL OF SCIENCE AND ARTS. 
[THIRD SERIES.] 
Art. I.—Contributions to Meteorology: being results derived from 
an examination of the Observations of the United States Signal 
_ Service, and from other sources ; by Eutas Loomis, Professor of 
Natural Philosophy in Yale "College. Ninth paper. With 
Plates I, IT and II. 
[Read before the National Academy of Sciences, Washington, April 19, 1878.] 
Low barometer at Portland, Oregon. 
In my last paper, page 5, I showed that the great storms of 
the United States frequently come from British Columbia or 
its vicinity. In order to extend this part of the investigation 
I selected from the published volumes of the Signal Service 
observations (Sept., 1872, to Oct., 1874,) all — cases in which 
the barometer at Portland, Oregon, fell as low as 29°7 inches. 
ese cases amount to sixty-three, ‘and correspond to eighteen 
different storms, as is shown in the following table, in cts 
column ist shows the number of the storm; column 2d 
the date at whichthe barometer was below 29°7 inches ; oottics 
3d shows the height of the barometer at Portland at the date. 
mentioned ; column 4th shows the direction of the wind, and 
column 5th shows its velocity at Portland at the date men- | 
tioned ; column 6th shows the rain-fall at Portland during the a Ze 
ht of © 
preceding eight hours; column 7th shows the least height of © 
the sitar ere observed at that hour at any station within the 
w area; column 8th shows the name of the station at — 
which the barometer was lowest; column 9th indicates the - - = 
region where the storm appears to have originated; Br. Co. 
denotes British Columbia; Can. denotes Canada, northwest ; 
4% Joon, Sot.—Tarmp Sens, Veen the Oe ee 
