E. Loomis— Observations of the U. S. Signal Service. 7 
American storms advancing Northerly and Easterly. 
No. Date. Latit’e.| Long. | course. | “42 | Lowest | previous course. 
1/1872. Nov. 6.1- 7.3 | 26-47 | 95-65) EL.N.E. | 60-4] 29°71 |Unknown. 
2 Nov. 7.3- 9.3 | 25-30| 95-78) E.N.E. | 21°1 | 29°74 |Unknown. 
be Dec. 9.2-13.3 | 26-47 |101-57) N.E. | 28°6| 29°86 |}Unknown. 
4 Dec. 23.2—27.2 | 25-44) 95-58) N.E. 29°8| 29°17 |Unknown. 
511873. Feb. 19.1-22.1 | 21-45} 98-64) N.E 35°1| 29-17 |Unknown. 
6 May 4.1-10.1 | 24-43) 98-81! N.E. | 15°8| 29°57 |Unknown 
7 Sept. 18.1-20.1 | 24-34| 92-74) N.E. | 24°3| 29°57 Unknown 
8 Sept. 22.3-24.1 | 25-36 —72| N.E 28°5 | 29°78 known 
g Oct. 5.1- 8 —43| 87-62| N.E 32°9 | 29°02 |Towards N.W 
10 Dec. 24.2—27.1 | 24-431; 88-62} N.E 30°4| 29°37 kno 
11 1874. Jan:  5.2— 9.1 —49; 87-68] N.N.E. | 18°0| 29°42 |Unkno 
12 Feb. 7.2-11.1| 25-46| 82-58] N.N.E. | 25:0} 28°95 |Towards N.W. 
is April 17.3-24,1 2 6 9\N.&N.E.| 29°7 | 29°36 |Unkn 
14 Sept. 2.3-10.2 22-50 | 99-89} North. | 21°5| 29°47 |Unknown. 
15 Sept. 27.1-30.2 | 25-50 | 87-66) N.N.E. | 26°0| 28°94 nknown 
ec. 18.2-21.1 | 25-39} 96-62) N.E. | 34°6| 29°33 no 
1711875. Nov. 6.1— 7.3| 25-31 | 98-78] E.N.E. | 32°9| 29°82 |Unknown. 
1811876. Oct. 19.1-21.1 | 21-32! 82-72) N.N.E. | 19°5| 29°51 |Not traceable. 
19/1877. Sept. 16.1-21.3 25-31 | 96-76, E.N.E. | 10°7, 29°40 no 
2011878. Jan. 6.1-12.2 | 24-46 100-56] N.E. 26°4| 28:85 |Not tra le 
21 Feb. 26.2-28.1 | 24-30| 92-71) E.N.E 1| 29-71 |\Camefrom N. W. 
22 Mar. 17.1-17.2 | 23-25 | 85-78) E.N.E 9-79 Not traceable 
23 Mar. f9.3-22.3 | 25-27 | 95-78) Hast. | 15°0| 29:71 |Came from W. 
24 July 2.1- 2.3 | 25-27| 85-78| E.N.K. | 22-9) 29°77 |Not traceable. 
25 Sept. 24 -33 | 15-32| 76-61/N.&N.E./ 10-1 | 29°70 |Not traceable. 
26 Oct. 21.1-24.2 | 20-38 | 81-57) N.& E. | 27°5| 28°83 |Not traceable. 
27 Nov. 13.3-20.1 | 22-44) 97-57/E.& N.H.| 24°5 | 29°83 |Not traceable. 
28 Nov. 17.2-21.1 | 24-47 | 93-57| N.E. |40°3| 29°47 |\CamefromN.W. 
2911879. Nov. 19.1-20.3 | 23-49 | 74-60) N.N.E. | 48-8 | 29°00 |Not traceable. 
3011880, Jan. 24 -—28.1 | 21-36} 86-75 N. 14:3 | 29°68 Not traceable. 
31 March 17.3-— 9.2 | 26-32} 99-74! E.N.E. | 38-0 | 29°8 Tot traceable. 
32 May 3.1- 6.2 | 26-47| 93-59) N.E. | 23°8| 29°79 |Unknown. 
33 Aug. 19 -20 90-27 | 78—T4| N.N.E. | 12° 29°86 |Towards N.W. 
Three of these storms had been traveling towards the north- 
west, previous to the dates given in the table, and two of them 
came from the northwest; but in the other cases the baromet- 
ric depression was too small to allow us to trace their course 
ne to the dates here given. For most of the cases in the 
ast half of the table this is clearly shown by the International 
Observations, and we may therefore infer it to be true in the 
other cases. As long as these storms continued south of lat. 
30°, the barometric depression was generally small, but it in- 
creased as the storm advanced northward. In fifteen cases the 
barometer fell below 29°5 inches, and in four cases it fell below 
29-0 inches. The average velocity of progress of these storm- 
centers while advancing northward and eastward was 269 
miles per hour. From a comparison of these three tables we 
perceive that the American storms which originate between 
the equator and lat. 20° N. generally travel towards a point 
