1914] Sumner, et al.: Physical Conditions in San Francisco Bay 51 
in the Berkeley curve than in that for San Francisco, the climate of 
the latter city being more largely influenced by proximity to the 
ocean than that of the former. 
Few observations were made by us upon the ocean temperature, 
outside of the Golden Gate. We have, however, figures from ten such 
stations. At stations H-5219 to 5225 (— D-5785, and 5787 to 5792— 
Berkeley.-” 
me be ee EPaSaN 
~. - 7 
oe Feb. Mor. Apr. May. Jun Jul Aug. Sept Oct. Nov. Dec. Jan, 
1212 1913 
Fig. H. Relations between local air and water temperatures. The con- 
tinuous line represents the annual temperature variations (already shown) for 
the bay as a whole. The two broken lines are based upon the monthly means 
for air temperature at San Francisco and Berkeley during the year covered by 
the hydrographie observations. 
see plate 2), temperatures were taken on October 15 to 22, 1912. 
The mean surface temperature for these stations was 11°54 C (52°78 
F), the extremes being 11°04 and 12°16. The mean bottom temper- 
ature, for five of these stations, was found to be 10°01, though this 
figure is not regarded as wholly reliable (see p. 151). 
On November 4, at stations H—5226 and 5227 (D-5806, 5807), 
not far outside of the Golden Gate, the mean surface temperature 
was 12°21 C (53°98 F), the mean bottom temperature being 11746 C 
(52°63 EB). 
The figure given by Thorade (1909) for the mean surface tempera- 
ture of the Pacifie Ocean, off San Francisco, in October, is 14°6 C, 
that for November being 13°28 C. Our figures are thus considerably 
lower than Thorade’s, a fact which is perhaps to be accounted for 
by the nearness of our stations to the coast line, in comparison with 
