HYDROGllAPHICAL SURVEY. 



TABLE. 



187 



Lat. 





J6\16' 



76.16 



76.34. 



77.15 



77.40 

 79. 



79. 4 



80. 

 78. 2 



Lone 



Experiments on Sea-watek. 



Depth 



Feet. 



1 



10.50 



10. 



g.lO 



.30 



™ Specific „ , 



Temp. ' ., Colour 

 ' gravit). 



9^ 0' E Surface 

 300 

 738 

 1380 



Surface 

 120 

 300 

 738 



Surface 

 120 

 240 

 360 

 600 



Surface 

 120 

 240 

 360 

 600 



Surface 

 300 

 660 



Surface 



5.40 



5.38 



5. 



O.IOW 



222 

 342 



600 



2400 



Surface 



4380 



Surface 



720 



Surface 



4566 



28\8 

 31.8 

 33.H 

 33.3 

 28.3 

 28.0 

 28.3 

 30.0 

 30.0 

 31.0 

 35.0 

 34.0 

 34.7 

 29.3 

 29.3 

 29.3 

 30.0 

 30.0 

 29.0 

 29.3 

 31.0 

 29.0 

 31.0 



3a8 



34.5 

 36.0 

 36.0 

 29.0 

 37.0 

 29.7 

 36.3 

 32.0 

 38.0 



1 2061 Blue 



1.0270 



1 0269' 



1.0265 - 

 1.0264'- 

 1 0266J 

 1 0268- 

 1.0267| 

 1.0267 



1.0267| Greenish 



1.0205 



1.0262 



Olive gr. 



1.0269 

 1.0265 



Blue 



Tem. TIME. 



of 

 Air. Da- Mo. Yr. 



Situation 



of 



the Vessel. 



12' 19Apr.l810 Shipbesetinice 



16 



16 



23 Apr. 1810 

 23 Apr. 1811 



1 May 1811 



20 May 1813 

 20Mavl816 



21 May 1816 

 7 Junel816 

 7 June 1817 



Ship frozen up 



Ship frozen up 



Shipbesetinice 



Am. floes, &c. 



Moored to a floe 



Am. floes &fiel 

 Ship beset 



Ice near 



" Down to this experiment, the apparatus used for bringing- up the 

 water, was the fir-cask ; and the mode of finding the temperature, was 

 by a common thermometer, after it came to the surface. Hence some 

 ihght change in the temperature might possibly take place during its 

 passage upward ; but, in all the subsequent experiments, a Six's ther- 

 mometer accompanied the marine-diver, and consequently marked with 

 accuracy the extremes of temperature through wliich it pas.5ed 



