4 FE. Loomis—Results from an examination of the 
and 2 struggling against an upper current from some N.W. 
quarter. The average direction of the wind on the summit of 
Mt. Washington in 1873 was from N. 76° W. If we regard this 
No. 3. Low BaroMETER ON Mt. W. No.4. Higu BAROMETER ON Mt. W. 
as the normal wind, and the winds shown in Nos. 1 and 2 to 
be disturbing forces tending to interfere with the normal wind, 
and we attempt to construct a triangle in which two of the 
sides shall represent these two forces, and the third shall repre- 
sent the iat actually observed, we shall obtain a satisfactory 
construction in six out of the eight cases. In two cases the 
construction fails, viz., for low barometer in the west quadrant 
and for high barometer in the north quadrant, but a small 
change in the value of one of the angles would render the con- 
struction possible. These figures indicate that the average 
amount of the disturbing force is about equal to the normal 
force ; in other words, the force of the winds shown in Nos. 1 
and 2, at the height of 6,285 feet, is about equal to the force of 
the normal current which prevails at that elevation. It seems, 
therefore, reasonable to infer that at the height of 5,000 feet, 
the winds shown in Nos. 1 and 2 must generally be strong 
enough entirely to displace the normal current at that height. 
It will be noticed that “for high barometer on Mt. Washing- 
ton,” the average height of the barometer was small, particu- 
larly for the east quadrant. But for the same dates, the aver- 
age height at Burlington, Vt., was 30°35 inches, which suggests 
the idea that in those cases the reduction of the Mt. Washing- 
ton observations to the level of the sea was too great. 
A comparison of diagrams 1 and 2 cannot fail to suggest the 
idea that a high barometer must exert an important influence 
upon a neighboring low barometer. It will be noticed that 
when the high barometer is on the east side of the low barome- 
ter, both systems tend to impress nearly the same direction 
upon the wind at a point intermediate between them, and the 
