BIGELOW: COAST WATER EXPLORATION OF 1913. AY? 
Station 10095), was distinctly colder (47.1°-47.5°) than the correspond- 
ing layer of water either west, north or northwest of it (Stations 10093, 
10096, 10097, 10100). Consequently vertical mixing of the upper fifty 
fathoms of water immediately surrounding the Bank could not repro- 
duce the temperature observed on the latter; there must have been 
either an influx of cold water from elsewhere, or some upwelling. 
The mean temperature of the layer of water between 50 and 100 
fathoms was:— 
Station Mean tem. Station Mean tem. 
10088 aa. 10093 AD. A 
10089 41.3° 10097 445° 
10090 Lae ee 10100 TA 
10092 42.6. 
At Station 10087, 50-70 fathoms, the mean was 41.2°; at Station 
10104, 50-85 fathoms, 40.5°. 
Thus the bottom water of the deeper parts of the Gulf, like the 
upper layers was warmest in the northern part of the eastern basin 
(Stations 10097, 10100); -coldest, next the western shore (Stations 
10087, 10104). 
In the preceding sentences the differences in mean temperature 
have been emphasized; but in reality the striking result of the calcu- 
lation is the uniformity of the Gulf, the extreme divergence of the 
mean of the upper fifty fathoms being only about 4°, that of the mean 
between fifty and 100 fathoms about the same, over an area of about 
fourteen thousand square miles. 
The mean temperature of the upper 15 fathoms, 7. e., of the zone 
most subject to solar warming, shows a much greater range (about 
‘11.2°), as illustrated in the following table:— 
Station Mean tem. Station Mean tem. 
10087 545° 10096 523 
10088 58 .5° 10097 Bee 
10089 ab. 1 10098 A@'.3? 
10090 Linas 10100 52 
10091 55.1% 10101 5125" 
10092 Deke he 101038 55).2° 
10093 58° 10104 Bae 
10094. yy ae 10106 5a 
10095 47 .7° 
