PRODUCTION AND COLLECTION OF SEED OYSTERS 
227 
head of the bay to 30.05-30.50 at its entrance. At low tide the differences in the 
salinities at the head of the bay and at its entrance were 3.02 per mille on July 26 
30 
29 
28 
27 
26 
25 
1328 SALINt 
. 
TY 
r— 
..... . 
; .. 
.7 
30 10 2 
0 30 9 19 29 
JUNE JULY AUGUST SLPTEMflW 
Figure 16. — Maximum and minimum air temperature, precipitation, water temperature, and 
salinity (per mille) in June^and September, 1927 and 1928. Onset Bay, Mass. 
and 2.41 per mille on September 4. At high water the salinity throughout the bay 
was higher, the difference between the head of the bay and its lower section being 
only 1.28 (June 26) and 0.78 (September 4). 
119414—30 5 
