94 On a Deep Sea Electrical Thermometer. [June 15, 



Depth in 

 fathoms. 



Eeading of 



attached 

 thermometer 

 coil. 



Reading of 

 Miiler-Casella 

 thermometer. 



Depth in 

 fathoms. 



Eeading of 

 attached 

 thermometer 

 coil. 



Reading of 

 Miller-Casella 

 thermometer. 



ourtace 





o 

 1 b 



feurrace 



o 



i ( D 



o 



77 o 



o 



7b 





c 

 



t D ZO 



75 '25 



10 



/TO • K 



7o o 



by 



^ a 

 1U 



h7C .C 



7o o 



69 





Ol ZO 



Do 



10 



bo o 



DO O 



OA 

 Z.V 



rf ,t 



oo o 



oy 



OA 



ZU 



58 



57 



OA 



oU 



Ol 



£.9 • K. 

 Q£ O 



oU 



C.1 . K 

 Ol O 



PCI »cC 

 Ol o 



OU 



OO / o 



DA 



C A 

 OU 



K A 'K 

 04 O 



Oo o 



/O 



CO .K 



oz o 



CO .P 



oZ O 



/O 



53 *5 



en ,e 



oZ o 



1UU 



CIA 



4y o 



i r>A 

 luu 



ol 



4J O 









125 



AO 



4o O 











T CA 



loO 



4b O 



4b 









200 



43 '5 



/IO .OK 

 4o ZO 









300 



40 '5 



/( a .f?c 

 4U /O 









400 



40 



39-75 









500 



39 -25 



39 









600 



38 -75 



38-75 









700 



38-5 



38-5 









800 



38-5 



38-5 



In the last series of observations in reeling back the cable, the tem- 

 perature at 50 fathoms was 54°-5, and fell to 51°'5 at 30 fathoms. 

 Immediately after another series was taken with, the Miller-Casella 

 thermometer, and the same increase of temperature from 30 to 50 

 fathoms was observed. The cable was lowered three separate times to 

 50 fathoms, and the readings being taken both when lowering and 

 reeling in with the following results : — 



Depth in 

 fathoms. 



Eeading of 

 attached 

 thermometer 

 coil. 



Reading of 

 Miller-Casella 

 thermometer. 



Depth in 

 fathoms. 



Eeading of 

 attached 

 thermometer 

 coil. 



Eeading of 

 Miller-Casella 

 thermometer. 



Surface 



o 



77 5 



o 



77-5 





o 





20 



57-25 



57 



30 



51-75 



52 



30 



52 -25 



52 



50 



54 -5 



53 -5 



50 



55-25 



53 -5 



75 



53 



52 -5 



20 

 30 

 50 

 75 



57 -75 

 52 -75 

 54 *75 

 53 



57 

 52 

 54 

 52-5 









During the above experiments the sea was perfectly smooth, with no 

 wind. The ship's engines were not used at all, the vessel lying almost 

 motionless in the water. The temperature of the comparison coil was 

 reduced by water from a carafe, the water contained therein being frozen 



