AMERICAN 
JOURNAL OF SCIENCE AND ARTS. 
[THIRD SERIES.] 
Art. I_— Results derived from an examination AG the a States 
Weather Maps for 1872, 73, and 74; by E L s, P 
fessor * es atural Philosophy i in Yale Colinge Third 1 paper. 
With Plate L 
[Read before the National Academy of Sciences, Washington, April 20, 1875.] 
In this Journal for July, 1874, I gave the average direction 
of storm paths and the velocity of progress for each month of 
together be with the average results derived from combining all 
the observations of the three years, making in the aggregate 
485 cases. 
Results for 1872 & a Results for 1874. Results for 3 years. 
| Veloci - 
ager a nl da niles Course. | Velocity. || Course, | Velocity. 
January ----|N, 86° E. N.74°H.| 23°0 ||N.81°E.| 267%. 
February - -.. 6 3°9 74 32°0 
Marek 3... 79 86 29°8 81 30°65 
seh eee 14 68 31-4 12 | QT 
May ios 78 16 22°2 V7 23°5 
ine 93 81 224 89 216 
Rt) Berens 102 88 25°9 97 
ugust 85 85 19°9 85 18-4 
eptember 78 10 | 331 die ae 
October _.... 69 28°5 14 2: 
ovember 80 44 30°3 78 29°0 
I went Sh 81 32°7 83 9° 
Year, (N.82°E .78°E.| 269 ||N.81°E| 26-0 
Am. Jour. Sc1.—TuiRp ones, Vou. X, No. 55.—JULY, 1875. 
