¢ 
Chase.] 524 [duly 1. 
daily duties, te such investigations ; but the field is so large that I would 
gladly welcome the co-operation of all who may feel an interest in studies 
that promise new and satisfactory results as a reward for diligent labor. 
The success of the Signal Service Bureau* has demonstrated the im- 
portance of careful attention to the most minute indications of possible 
law, and the influence of the physical geography of our continent upon 
‘the weather has been so well ascertained that we may reisonably hope 
for similar success from a like careful study of astronomical influences. 
The well-known tendency to weekly metecrological cycles has never been 
attributed to any more obvieus or probable cause than lunar modifications 
“of solar actien, and such evidences of cyclical uniformity as have already 
rewarded my limited researches, encourage me to hope that much of the 
apparent discordance and supposed accidental irregularity, by which 
meteorologists ave still perplexed, will be finally shown, by broad generali- 
TABLE IT, 
Correspondent Rainfalls at San Francisco, in Lunar and Solar periods, 
oO LUNAR MONTHLY. | SOLAR YEARLY. 
— ae fai 
1864-72 Av. 1849-57 1857-64 1864- 
RIS, eo Aik ers ci 
N. R. 
16.98 266 
14.01 233 
12.98 184 
6.03 159 
9.87 187 
20.62 218 
8.63 200 
7.55 186 
7.64 104 
2.95: 72 
3.48 44 
62 1 
03 7 
05 2 
12 1 
00 mf 
02 0 
OL a 
00 4 
62 9 
Mle de 
69 «21 
8.37 85 
8.82 168 6.97 168 16.56 192 172 
9.59 208 11.03 202 12.96 5 
20.09 254 18.35 254 89.21 349 290 
* Captain Toynbee’s recent discussion, for the British Meteorological Committee, ‘‘ of the me- 
teorology of the part of the Atlantic lying north of 30° N., for the eleven days ending 8th Feb- 
ruary, 1870,’’ gives very flattering evidence of the estimation in which this success 
abroad. On page 164, he sa: **This paper only deals with eleven days of rather exceptional 
weather, when a southerly wind prevailed on our coasts, It can only be considered as a first 
attempt at the style of work which is needed to connect the excellent observations now being 
‘éuken in America with these in Europe, 
s held 
$ 
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