42 



BULLETIN OF THE BUREAU OF FISHERIES. 



In Vineyard Sound, the maximum surface temperature (69. 3 ) occurred near 

 Nashawena Island, but such a temperature was quite exceptional in this portion of 

 the Sound, as reference to the chart will show at a glance. With this exception, the highest 

 temperatures are at the eastern end. At one station just beyond the western limits 

 of Vineyard Sound (W) the surface and bottom figures were 60. 3 and 55. o°, respectively. 

 A rather abrupt fall in temperature is encountered in passing southwestward through 

 the Sound when we reach the line passing from Robinson Hole to Kopeecon Point. 

 The mean bottom temperatures for the portions of the Sound lying above and below this 

 line are 67. 35 and 60 24 , respectively (based upon chart figures only). As we shall 

 find later, this lower temperature of. the outer portion of the Sound is correlated with 

 important differences in the bottom fauna. In Buzzards Bay the lowering of tempera- 

 ture toward the mouth is less abrupt, and water colder than 64 occurs only near the 

 extreme end. The water appears to be at no point as cold as it is on the other side of 

 the Elizabeth Islands. 



Table 3. — Temperature and Density: Vineyard Sound, November, 1907. 



Temperature station. 



Date. 



Depth in 

 fathoms. 



Air 

 •temper- 

 ature. 



Surface 

 temper- 

 ature. 



Surface 

 density- 

 Cat is°C). 



Bottom 

 temper- 

 ature. 



Bottom 

 density 

 (ati S °C.). 





Nov. 13 

 Nov. 11 

 ...do 



8 



"J* 

 6 



10 



7 

 12 

 10 

 13 



S 



7 



7 

 11^ 



8 

 12? 



sx 



8 

 14 

 ioJ<< 



8 

 18 

 I7J4 

 nJ4 



8H 



39- 

 47- 

 46.0 

 48.0 

 40.0 

 37-5 

 39- 

 49.0 

 39-5 

 40. S 

 49.0 

 40. S 

 39- 

 39- 

 49.0 

 42.0 

 41.0 

 49.0 

 42.0 

 41.0 

 43- 

 45- 

 40.0 

 39-5 

 41- S 



50. 2 



Si- 4 



51-2 



Si- 7 

 49-7 

 49-7 



50.7 



SI- 2 



Si- 1 



50. 6 

 Si- 2 



51. 1 

 49-7 

 SI- 1 

 Si- 2 

 Si- 2 

 SO- 7 

 Si- 7 

 Si- 7 

 SO- 7 

 SI- 2 



SI- 2 

 SI. 2 



SO- 9 



1. 0240 

 1-0237 



1.0238 

 1.0238 



1. 0240 



1. 0238 

 1. 0242 

 1. 0240 

 1.0238 

 1. 0240 



1. 0240 



1. 0241 

 1.0238 



1. 0241 



1. 0242 

 1.0238 



1. 0242 

 1. 0241 

 1. 0241 



1. 0243 



1. 0240 



1. 0241 

 1. 0241 



Si- 1 

 Si- 6 

 Si- 4 

 Si- 4 

 Si- 5 

 SO- 3 

 50.8 

 SI- 4 

 SI'S 







1. 0341 







...do 



1.0238 

 1. 0241 

 1. 0240 





Nov. 12 

 Nov. 15 

 Nov. 12 

 Nov. 11 

 Nov. 12 

 ...do 









1. 0238 







1. 0241 





Nov. 11 

 Nov. 12 

 Nov. 15 

 Nov. 12 

 Nov. 11 

 Nov. 12 

 ...do... 



Si- 4 

 Si. 8 

 SO- 5 

 Si-S 

 SO- 9 

 S2-o 

 SO- 5 

 Si- 1 

 52. 

 Si- 9 

 SI. 9 

 S2.o 

 Si- 6 

 S2-S 



S2.0 









1 0-40 





1 0241 













1 0340 





Nov. 11 

 Nov. 12 



...do 



...do 



1 0241 



T 





U 



1.0243 

 1. 0238 



W (repeated) 



X 



Y 



Nov. is 

 Nov. 12 

 ...do 



1. 0241 



1. 0244 

 1.0242 



Mean 







SO. 90 



1. 02401 















