BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 43 



Table 4. — Temperature and Density: Buzzards Bay, November, 1907. 



Temi.erature station. 



A i Nov. 13 



B i...do.... 



C.v 



D.. 

 E.. 

 F.. 

 G.. 

 H.. 



J.. 

 K. 

 L.. 

 M., 

 N.. 

 O.. 

 P.. 

 Q.. 

 R.. 

 S.. 

 T.. 

 U.. 



v.. 



do., 

 L.do.. 

 do., 

 .do., 

 do.. 



.do., 

 .do.. 



do.. 



..do.... 

 Nov. 15 

 ..do.... 

 ..do.... 

 do.... 

 ..do.... 



..do 



..do.... 

 ..do.... 

 ..do.... 

 ..do.... 



Mean. 



Depth in 



fathoms. 



3 



2'A 



6 



i'A 



6H 



S'A 



S 



iy> 



6 



S 

 7 



B'A 

 6 



S 

 8 



S'A 

 6'A 

 13 

 6',i 

 7 



Air 

 temper- 

 ature. 



35- o 

 37- o 

 34- o 

 4J.O 

 36.0 

 3SO 

 39- o 

 41.0 

 33- o 

 4t. S 

 42. o 

 43- o 

 38.0 

 33- S 

 35- S 

 36.0 

 36.0 

 39- o 

 40.0 

 39- o 

 43.0 

 40.0 



Surface 

 temper- 

 ature. 



46.3 

 47- 7 

 48.2 

 4S.= 

 47-3 



48. s 

 48.7 

 48.7 



49. 2 

 48. 2 

 49.7 

 49-5 

 47- 2 

 48.0 

 48. S 

 48.6 

 48.7 

 47-9 

 49-7 

 49.7 

 48.7 

 49-7 



38. 25 ; 



43. SO 



Surface 



density 



Cati3°C.), 



0214 

 0223 

 022S 



02jO 

 0226 

 0231 

 0236 

 0237 

 023s 

 0334 

 0237 

 0237 

 0238 

 0238 

 0238 

 0239 

 0238 

 0236 

 0237 

 0240 

 0236 

 0240 



Bottom 

 temper- 

 ature. 



49. S 

 49.4 



50. I 

 49- 5 

 50.0 

 49.1 

 49-3 

 49.8 

 49.8 

 48.9 

 SO. 5 

 50. r 

 47-5 

 48.3 

 48.8 

 30. o 

 49. I 



49. I 



50. S 

 50. 1 

 49- o 

 50.4 



Bottom 



density 



(ati5°C.). 



49- SI 



I. 0220 

 I. 0229 

 I. 0229 

 1.0230 

 1.0228 

 1.0232 

 I. 0236 

 I- 0237 

 I. 0238 

 1-0233 

 1.0237 

 1.0237 

 I. 0237 

 I. 0239 

 1.0238 

 I. 0240 

 1.0239 

 1.0236 

 1.0237 

 1. 0240 

 1.0236 

 I. 0240 



November. — Temperature and density conditions at the middle of November, 1907, 

 are shown in tables 3 and 4, the temperature conditions being shown on chart 212. 

 When compared with the conditions during August, the chief facts to be noted are: 



(i) The great reduction in water temperature naturally resulting from the approach 

 of winter. The mean of all the figures is 50.14° as against 64.91° during the August 

 observations. 



(2) The comparative uniformity of all the figures, the extremes being 46.3° and 

 52.5°, showing a range of 6.2°, in place of a range of 16.5° as in August. 



(3) The exact reversal of the differences found in August. Here the surface temper- 

 atures are somewhat lower than the bottom ones (average = 49.78° and 50.47° respec- 

 tively); the Bay is colder than the Sound (average = 49.00° and 51.16°); and we meet 

 with slightly higher temperatures as we pass toward the open ocean. This last tendency 

 is not very evident in Vineyard Sound, but is quite marked in Buzzards Bay. All 

 these differences are, of course, quite intelligible. At this time of the year the air tem- 

 perature has become much colder than that of the water. It is natural, therefore, that 

 the surface of the sea should cool more rapidly than the bottom, and that the shallower, 

 more sheltered waters should cool more rapidly than the open ocean. 



