iv University of California Publications. [ ZOOLOGY 
rest of the year there are few days on which, for a portion of the 
day at least, work cannot be carried on anywhere in the area with 
slight interference from heavy seas; and even during the months 
subject to storms only rarely is it interfered with. The practical 
importance of this can hardly be overvalued, as all experienced 
in this sort of work will appreciate. Not only does it make a 
completeness of field observations practicable, that could hardly 
be secured with any kind of a vessel in more storm afflicted 
regions; but it reduces the cost of exploration to the minimum, 
for the work can be done in a vessel much smaller, and hence 
much less expensive of operation than is ordinarily required for 
such work. Dredging and trawling to a depth of 500 fathoms 
at least from a vessel of 60 foot keel, manned by three men, is 
perfectly feasible; and sounding and various kinds of work on 
surface and intermediate waters can be done at considerably 
greater depths with the same equipment. 
The following table, made up from data contained in the 
Monthly Synopses of the United State Weather Bureau, presents 
information concerning climatic conditions at San Diego during 
1904, an entirely typical year. 
TABLE OF METEOROLOGICAL CONDITIONS, 1904. 
TEMPERATURE. PRECIPITATION. WIND. 
3 s Be 
ae Wane ey 
2 LOCALITY. a a as — i AE > a 
= a a a As HA ad 
JANUARY. 
Nantucket. 2 .se% se. 34 22 5.98 16 11,849 60 
Key West: 4).2% << one. 73 82 1.42 7 7,834 31 
Parallone.. <incce-. see 54 49 . 88 7 12,117 48 
San Francisco ...... 56 45 1.05 5 4,292 26 
San iDiego" si... eents 65 47 .04 2 4,310 27 
FEBRUARY. 
Nantucketa moun 32 19 3.86 15 11,386 47 
ey: Wiest: -.:t52.s'ges 76 66 1.08 +4 7,106 33 
Harallones .cscece see 53 49 6.13 16 10,149 50 
San Francisco ...... 55 46 5.89 16 5,561 31 
San Dieso\ ct. esters 61 48 1 50 6 3,802 36 
AO OE Rai pn iy me a lla alga 
te eel 
oe 
