PRODUCTION AND COLLECTION OP SEED OYSTERS 
241 
for a more detailed discussion of the various factors the reader is referred to the 
author’s previous paper (Prytherch, 1929). 
TEMPERATURE 
The temperature of the water in Milford Harbor was recorded continuously 
during the summer months by means of a thermograph set up at the laboratory. 
The daily variations in water temperature and its trend during the summers of 1925 
and 1926 are shown in Figure 25. In 1926 and 1927 the mean water temperature 
for July and August was slightly lower than in 1925 as shown in Table 25. The 
i i i — — 1. 1 i — — i — i — i — — i — i — i — — i — i_j — — i — i — i — — i — i—i — i — i — i — i — — i — i — i — i — i — i—i — — i — i—i — — i_i — i — — i — i — i — i— i — i — i — — i_i—i — — i— i—i 
5 9 13 17 21 25 29 2 6 '0 14 18 22 26 30 
JULY AUGUST 
Figure 25.— Maximum, minimum, and mean daily temperature of the water, 1925 and 1926, Milford Harbor, Conn. 
average of the three years gives us a mean monthly temperature of 18.7° C. for July 
and 20.5° C. for August. 
Table 25. — Water and air temperatures in Milford Harbor during July and August, 1925 to 1927 1 
Mean monthly temperature, ° C. 
Year 
July 
August 
Water 
Air 
Water 
Air 
1925 
19.7 
17.8 
18.5 
21.8 
22.0 
22.4 
20.8 
21.6 
19.0 
21.6 
21.8 
19.3 
1926 
1927 
Average for 3 years. 
18.7 
22.0 
20.5 
20.9 
1 The normal air temperature for this region is 22.2° C. in July and 21.1° C. in August, according to the records of the U. S. 
Weather Bureau at New Haven, Conn. 
