BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 



39 



on August 20, as likewise on August 22; and stations in both Vineyard Sound and 

 Buzzards Bay were visited for a second, third, and even fourth time on August 28 and 29. 

 Thus, while it is not possible to present simultaneous readings throughout all the waters 

 under consideration, the most extreme points were reached within a limit of five days 

 (August 14-19); and such supplementary determinations were made as to eliminate 

 confusion of results by seasonal change. A consideration of these supplementary 

 temperature determinations, 41 in number, shows that, although they were made after 

 an average interval of nine days, the mean difference (irrespective of sign) between the 

 first and the later determination was i.8° F. It will be noted also that in many cases 

 the later temperature was higher, instead of lower, though, on the average, it was found 

 to be about ^ degree lower. Moreover, a consideration of the chart (No. 219) repre- 

 senting the mean annual temperature curves for the Woods Hole station shows that the 

 variation in water temperature at the latter point during the entire period of the present 

 observations (August 14-29) is, in this five-year average, but a trifle over i° F. The 

 variations within the limits of a single day, due to tidal influences, are doubtless more 

 serious sources of error, at least for surface temperatures; but it was, of course, 

 impossible to eliminate these. 



Table i. — Temperature and Density: Vineyard Sound, August, 1907. 



Temperature station. 



B 



C 



D 



E 



F 



G 



G (repeated). 

 H 



I (repeated).. 



J 



J (repeated).. 



K 



L 



L (repeated). 



P (repeated). 

 P (repeated). 



Q 



R 



S 



T 



U 



U (repeated). 

 U (repeated). 



..do. 

 ..do. 

 Aug. 

 ..do. 

 Aug. 

 Aug. 

 Aug. 

 Aug. 

 Aug. 

 Aug. 

 Aug. 

 Aug. 

 Aug. 

 Aug. 

 Aug. 

 ..do. 

 Aug. 

 Aug. 

 Aug. 

 Aug. 

 Aug. 

 Aug. 

 Aug. 

 ..do. 

 Aug. 

 ..do. 

 Aug. 

 Aug. 

 Aug. 



67-3 

 67.7 

 68.3 

 67-7 



66.3 

 67-3 

 67.0 

 67.8 

 66.7 

 67.8 



70.3 

 69-3 

 68.3 

 67.1 

 66.8 

 66.2 

 70- 3 

 69.8 

 69.1 

 68.7 

 64. s 

 64.9 

 71.8 



68.3 

 67.6 

 66.8 



67-3 

 64. 6 

 66.3 



64-3 

 65.8 

 64.8 

 61.9 

 63-7 

 63.8 

 69-3 

 62.8 

 63.0 

 62.4 

 63- 3 

 62.3 

 63.1 



Surface 

 density 

 (ati s °C.). 



.0241 

 .0237 



.0234 



■ 0238 



• 0238 

 .0239 

 •0237 

 •0235 

 .0243 



• 0238 

 .0237 

 .0240 

 .0242 

 •0237 

 •023J 

 .0241 



Bottom 

 tempera- 

 ture. 



69-3 

 68.5 

 66.9 

 66.3 

 6S- 3 

 67.5 

 6s-S 

 67.4 

 63-4 

 65-3 

 65-5 



63.5 

 60.9 

 S8.2 

 6r. 4 

 59-3 

 61.4 

 58.6 

 38. 8 



Bottom 

 density 

 (atis-C). 



.0239 

 .0239 

 .0237 



.0237 

 . 0240 

 .0239 

 .0236 

 .0239 

 .0236 

 .0239 

 .0240 



• 0236 

 .0243 

 .0239 

 .0237 

 .0241 

 ■ 0241 

 .0237 

 .0238 

 .0243 

 .0239 

 .0241 

 •0239 



• 0236 

 .0237 

 •o»34 

 .0241 



