14. EK Loomis— Observations of the U. S. Signal Service. 
the two centers of low ee Plate IIL epg the iso- 
bars for this date, and shows a maximum pressure at Alpena 
amounting to 30 66 inches, sis: a minimum on the east side of 
29°49 inches at Sydney ; i and a minimum on the west side of 
29°49 inches at Fort Sul 
The direction of the Fis is shown by the arrows, and its force 
is shown by the number of feathers attached to the end of the 
arrow. One feather indicates a velocity uot exceeding five miles 
per hour; two feathers indicate a velocity from six to ten miles ; 
three feathers, from eleven to fifteen miles; four Saw from 
sixteen to twenty miles, and so on for higher velocities 
Plate I accompanying my fifth paper represents an area of 
high barometer near the Mississippi River, with an area of low 
barometer in Oregon. ere was at the same time an area of 
low barometer on the east side, which had just passed beyond 
the limits of the chart. 
ne of the most aacecbotti circumstances attending these 
areas of high pressure is the force of the northerly wind which 
precedes their formation. The following Table shows the 
direction and force of the wind (in miles per hour) at certain 
stations at the time of formation of each of the = of high 
barometer mentioned in the Table on pages 8, 9 and 1 
No. 1.—1872, Oct. 27.1, Quebec, oes N. E. 3 
No. 2.—Nov. 12. = Fort Sully, Ne 4 ; Nov. a 5 Meher 
N. W. 45; Nov. 13. 3, Breekunidgs, WW 
Fort Sully, NW. 42; Sh N. W. an, New ed 
bbe ga At N. W. 36; Pembina, N. W. 30; Nov. 15.1, 
reckenridge, N. W. ae: Pembina, N. W. 32; Nov. 15.2, 
Brckontd e, N. eg 473 Omaha, N. W. 30; Nov. 15.3, 
Pembina, _W.3 
No, 3.—Nov. 16. 3, Bieckeodsigae N. W. 30; Nov. 17.1, Brecken- 
ridge, N. W. 28; Nov. 18.2, Fort Sully, N. W. 32. 
No. 4.—-Nov. 27.1, Grand Haven, N. W. 32; Milwaukee, N. W. 
41; Nov. 29.2, Quebec, N.E. 57; Nov. 29.3, Quebec, N.E, 42. 
No. 5. 8.1, Quebec, N. E. 41 ; Dec. 8.2, Escanaba, N. W. 
30; Dec. 8.3, Milwaukee, N 30; 9.1, Milwaukee, N. 
36; Dec. 9.2, Cape May, N. W. 36; a 9.3, Philadelphia, 
N. W. 36; Dec. 10.1 1, New York, N. W. 36. 
No. 6.—Dee. 20.1, Quebec, N. E. 33; Dee. 21.2, St. Louis, N. W. 
38; Dee. 22.1, Cape May, N. W. 34, 
No. 7.—Dee. 22. 2, Breckenridge, N. W. 33; Fort Sully, N 
Dec. 22.3, Breckenridge, W. 40; Dec. 23.1, Chicago, vw 
a h . 32, 
No. 8.—Dec. 26.1, Milwaukee, N. E. 30; Dec. 26.2, New London, 
N. 325 ge 26.3, New York, N. W. 30; Dee.” een Milwau- 
kee, N. W . 805 Dee. 27.2 2, Grand Hav ven, N. W. 3 
No. 9.—1873, Jan. 9.1 , Breckenridge, N.W. 32; Pork Gas Ws 
BES Pembina, N. Ww. 36; Jan. 9.2, Breckenridge, WN . 35. 
