(tt low Temperatures* 14^ 



i^ the quotient ; this again dividing the specific gravity of 

 the mercury 1 4*465, the quotient is at this temperature 

 •8665, the specific gravity of the alcohol according to G, 

 which agfecs with the calculations from the loss of 

 weight of silver by experiments at H, and calculations 

 at I, it there appearing that '86G5 is the specific gravity of 

 the alcohol. 



M. Supposing the mercury weighed by the hydrostatic 

 balance at G in a solid form, during the variations in the 

 loss of weight from 59-9 to 61, to have passed through 20' 

 of temperature to 76^ below zero, and to have ipcreased 

 •<K)1 each degree, then mercury in a solid «tate will have 

 arrived at the specific gravity 14*485, and the alcohol in, 

 which it is weighed with a loss of weight of 61 will conse- 

 quently be of greater specific gravity. 



For if alcohol at 56^ below zero was of the specific gra- 

 vity '8665, as at l^ the mercury losing 59*9, ^^s at G, and at 

 a lower temperature the same mercury weighed In the same 

 alcohol lost 61, it will appear that the alcohol must have In- 

 creased in specific gravity ; for if 59*9 be •8665, 61 will be 

 •8842, the mercury remaining at 14*465, as at L; but as we 

 have reason to state, it passes on to 14*485 at 76' below 

 ?ero, then the specific gravity of the alcohol must appear 

 lobe '5854; because if 14*485 Increases '001 each degree,, 

 •8842 will increase 'OOOOei; which sum_, multiplied by 20, 

 equals -001220 ; this, added to '8842, equals -8854. 



N. We observe at F, 3054 of mercury lose 222* 1 at 50^ of 

 temperature; at 200^ of temperature it loses 217*4; and by 

 calculations at L, the specific gravity of the mercury so 

 weighed was shown to be 12*407 at that degree of heat. 



Then by the rule at I : — 



If 3024 be divided by 217*4, the (juotlent is 13*909, which 

 sum dividing 12*407, the known gravity of mercury at L, 

 the specific gravity of the water will consequently appear to 

 be '8920 : this deducted from 1000, the specific gravity of 

 water at -50^ of temperature, leav?:s *10SO, the sum of dilTer- 

 rencc in 150 degrees^ and 



K3 at 



