528 
BULLETIN OF THE BUREAU OF FISHERIES 
fully in the chapter on the circulation of the gulf (p. 921). Its existence and its effect 
on the bottom temperatures of the gulf are among the most interesting facts brought 
out by the survey. 
A counter expansion of water colder than 6° and fresher than 33 per mille, out 
of the gulf and around the southeast face of Georges Bank, also adds interest to the 
100-meter chart. 
In February and March, 1920, the gulf proved warmer at 200 meters than at 
100. Probably the 200-meter level is never as cold as 4°; in fact, most of the readings 
were fractionally higher than 5°, being from 4.29° in the Fundy Deep to 6.85° in the 
Temperature, Centigrade 
Fig. 6. — Vertical distribution of temperature in the deep trough between Jeffreys Ledge and the coast, March 
to August. A, March 5, 1920 (station 20001); B, March 5, 1921 (station 10509); C, May 14, 1914 (station 
10278); D, August 22, 1914 (station 10252). The broken curve is for August 9 of the cold summer of 1923 
Eastern Channel, with 5.2° to 5.6° at most of the stations. The 200-meter temper- 
ature at the three February-March stations outside the edge of the continent^were 
as follows: 12.39° off the southwest face of Georges Bank on February 22 (station 
20044), 5.9° off its southeast slope on March 12 (station 20069), and 7.89° off Shel- 
burne, Nova Scotia, on March 19 (station 20077). 
