On the Winds of the Western Coast of the U. States. 58 
The mode of observing was that described in my paper on the 
winds at Cat Island, read before the Association in 1850. The 
observers were posted and practised together by Lieut. W. P. 
Trowbridge of the U.S. Corps of Engineers, under whose su- 
pervision the observations were made. 
Survey, to whose care, assiduity and knowledge I am indebted 
for the opportunity of presenting them. The computations and 
e diagrams were made by Miss Mary Thomas. ., 
The observations were taken three times each day, at 6 ae 
Table for deducing from the three daily observations the mean of the day, 
DIEGO. 
6 SSA cal hecraa BAN FRANCISCO. SAN : — 
Wind. nee © Gs Wind. ~ = Wind. | g 2 <7 
tach eltte eiftis eicis 
N.E, 6h| 6h! gh| n.& Ne | 9b| 6b| Ob} w.aw.e. | 6b) 6b) Gh 
% ve toMar. incl.) | 9 | 6 | 9 z 31313 z |8\|8\8 
is Pr. to Sept, incl.)| 8 | 8 | 8 |8B,548.W.|9 | 6 |) 9] SRas | 9 | 6/9 
8.E. 6161/6 v. 9 | 5 |10| sw.aw. [18 | 6 | 6 | 
8. ) ‘ : 
SW. & Ww. M : : N.W. 9/619 NW, 18 | 7 |e ; 
NW. 8 5 7 * : 
a 8 13-3 oe 
