Fishery lodnstries of the United States, Sect. III. 



OCEAN TEMPERATURE CHART No. 21 



By RICKARD SAXHBUN. 



Station: Boon Island Light House, Maine. 



Representing, by means of curves, the temperature of the air from iSSi to 1883, inclusive, and of the water at the surface from 



1881 to 1885, inclusive, reduced to means of ten days. 

 EXPLANATION OF THE CURVES: iSSi. 1883, 1883, 1884, 1885. 



^SUEDJDi l886.} 



