APP. n" vitt.] specific gravity of ice. (81) 



Here the journal terminates with the word die ; alludino- 

 perhaps to other observations which the writer, in his usual 

 way, had been about to set down. The first man of this 

 unfortunate party died on the 16th of April, the other six 

 seem to have expired in the beginning of May, The scur- 

 vy was evidently the cause of their death, which, it appears, 

 arose more from the want of fresh provisions than from the 

 cold, as they could generally stir abroad at least once in three 

 or four days. 



No. VIII. 



EXPERIMENTS FOR DETERMINING THE SPECIFIC GRAVITY OF 

 ICE. 



[Referred to p. 234.] 



Some attempts to obtain the specific gravity of ice, by 

 measuring the proportion of rectangular pieces which floated 

 above the surface in a vessel of water, having given discor- 

 dant results, a more accurate method was adopted. 



Three masses of ice, of different qualities, being drained 

 some time in air when the temperature was 30°, (the most 

 porous in a warmer situation), were washed in pure water, 

 dried, and carefully weighed. A copper ball, weigliing 2515 

 grains, being then attached alternately to each mass, the 

 weight in a vessel of fresh water, at a freezing temperature, 

 was found. From these data the following results were 

 obtained. 



VOL. I. APPENDIX. (/) 



