,82) 



SPECIFIC GRAVITY OF ICE. [aPP. N*^ VIII. 



These experiments with similar kinds of ice, and under 

 similar circumstances, were repeated on another voyage, in 

 which the coincidence of the results are remarkable. The 

 specific gravity, (compared with fresh water, temperature 34°,) 

 of a specimen the same as No. 1. was found to be 0.9165 ; 

 of a specimen similar to No. 2. 0.9200 ; and of another ccw- 

 rcsponding Avith No, 3. 0.9215. Specimens of the same de- 

 scriptions of ice compared with sea-water, temperature 34°, 

 gave the specific gravity of No, 2.=0.8942, and of No. 3.= 

 0.8943. 



When all these experiments were made, the temperature 

 of the air being within 2 degrees of the freezing point, was 

 particularly favourable. The experiments were conducted 

 throughout in the open air, and the blocks of ice, when 

 handled, were lifted with a woollen glove. All the apparatus 

 that was used had the temperature of 30° to 34°, so that no 

 loss was likely to take place by the melting of any portion of 

 the ice. 



END OF VOLUME FIRST, 



