276 



Observations of the Temperature of the Surface of 

 the Sea off Plymouth. 



The observations given below are by Mr. William Eoach (Series I), 

 Associate Member M. B. A., and by Mr. H. Roach (Series II), the 

 fisherman of the Association. The observations are taken partly in 

 Plymouth Sound and partly on the fishing grounds a few miles to 

 the eastward. A careful comparison of the two sets during the same 

 periods does not show any local differences, and as the observations 

 are true sea temperatures throughout, it is unnecessary to state the 

 positions more definitely. 



It has been thought best to give the results in the form of ten-day 

 means, as being most convenient for use in connection with fishery 

 statistics. — H. N. Dickson. 



Date. 



1891. 

 July 21— 30 ... 

 July 31— Aug. 9 

 Aug. 10—19... 

 Aug. 20—29... 

 Aug. 30— Sept. 8 

 Sept. 9— 18 ... 

 Sept. 19—28... 

 Sept. 29— Oct. 8 

 Oct. 9—18 ... 

 Oct. 19—28 . . . 

 Oct. 29— Nov. 7 

 Nov. 8— 17 ... 

 Nov. 18—27 ... 

 Nov. 28— Dec. 7 

 Dec. 8—17 ... 

 Dec. 18—27 ... 

 Dec. 28— Jan. 6 



1892. 

 Jan. 7—16 ... 

 Jan. 17— 26 ... 

 Jan. 27— Feb. 5 

 Feb. 6—15 ... 

 Feb. 16—25 ... 



Series II. 



No. of 

 obs. 



Temp. 



58-6° 



58-0 



57-3 



56-6 



541 



52-9 



51-8 



51-8 



49-8 



49-4 



46-8 



46-5 



46-7 



