18  E. Loomis+-Observations of the U. S. Signal Service. 
No. Low center (29°70) on the Northwest side which gradually approached 
“ she ia aR ith No. 
bars protruded very vane towards S.W. 
eben protruded very m 
L e 
29°50) on the Northwes 
i protruded to a great stance towards 8.W. 
Low er (29-80) in the Gulf o 
‘ caihens: protrided to a great Susie  owaea 8.W. 
Low N.W. 
SSSSSSH SS 
et pet CO 
Soe SP was ws 
No. 13. watcetiaete low center on the N.W. 
Thus we see that while on the East side of these low areas 
there were causes which tended to increase the pressure on that 
side, there were different conditions on the Western side which 
tended to divert the winds Westward, and this is apparently 
the most important reason why, in these cases, the centers of 
least pressure advanced Westward. 
Storms advancing Westerly over Europe and the Atluntic Ocean. 
The following table shows the most decided cases in which 
storm centers advanced in a Westerly direction over 
Kurope and the Atlantic Ocean. 
European storms advancing Westerly. 
Mos} 2 Daten: << ARR Ont, | Gomme. | Vel komt] Suneaiacet 
1|1875. Mar. 14-16/50 -46 |37W.-434W.| 8S. 8:3 | 730 | Absorbed 
2 ec. 17-19\64 -64 | 29W.-43W. | West 8°8| 720 megs 
31876. April 19-20|52 -66 | 3W.-5W. |N.N.W.| 12°2| 735 |N.E 
4 June 19-20/574-604| 234W.-27W.| N.W. | 10-1} 730 Subdivided 
5 June 22-23!573-59 | 26W--334W.| N.W. | 12°1| 740 | Disappeared 
6 Sept. 9-12/55 -60 | 21K.-7E. | N.W. | 8-0| 735 |Subdivided 
7 Sept. 22-23/544-56 | 264W.-30W.| N.W. | 6-7] 740 |Subdivided 
8 Oct. 20-21| 563-64 | 34}W.-49W.| N.W. | 28°7| 720 | Eastwa 
9 Noy. 12-14|50 -52 | 7W.-16W. | W.N.W.| 8°8| 730 |Northward 
10 . 21-23/53 -56 | 1W.-8W. | W.N.W.| 3°8| 729 |Southerly 
11/1877. April 4- 8156 -50 | 9W.-13W. | SS.W.| 4:8| 733|N-.E. 
12 May 3- 6/52 -64] 44K.-18E .W. |17-2| 744 disappeared 
13 July 15-16/54 -54 | 2W.-5W West | 3°4| 737 
14 Aug. 54-57 -4W. N.W. | 19°2| 745 sapere 
15|1878. Mar. 31-32)59 -59 10E.-0 West | 14°3| 729 
16 May 30-32)60 -60 | 27E.-17 West | 71] 741 ig 
17 N 4— 654 -59 | 25K.-19E. |N.N.W.| 8-6] 737/N.E. 
18 Nov. 11-13|59 -49 | 7E-3K. | SS.W.|14-4| 733 |S.E. 
19 Nov. 14-16/47 -54 0E.-4E .N.W.| 11°5 | 734 |South 
20 Dee. 10-11/52 -56}| 25K.-23E. | N.N.W.| 14-9] 739 |N.E. 
211880. Feb. 164-17/54 -56 | 74W.-10W. | N.W. | 17-2} 720 |Unknown 
The first eight cases are derived from an examination of 
Hoffmeyer’s charts. Six of — cases occurred near the mid- 
dle of the Atlantic ocean; one on the western borders ° 
Kurope, and the other in ee eastern part of Europe. They 
are cases in which the depression of the barometer was cael 
; 
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