I4t On the Contraction ivJdch takes place hi Mercunj 



of alcohol at several points of the scale 6f temperature by 

 calculations at I, from ej^pcriments at H, the calculation of 

 ihe-spt'ct/Ic gravity of mercury is thus perforjiied : — 



L. — Divide the quantity by the loss, and multiply the 

 quotient by the specific gravity of the alcohol at such tem- 

 perature. 



Thus, mercury at G, in the temperature of 56^ below 

 zero, appears to be of the specific gravity 14-465. For divi- 

 ding 1000 by 59*9, the least loss in the solid state, and mul- 

 tiplying the quotient 16'694 by *S665, the specific gravity 

 of alcohol at that temperature^ the product is 14*465. 



Then if mercury in 106% from 50^ above to Gb'^ below 

 zero, increases in specific gravity from 13*613 to 14*465, 

 namely *852, which gives *O0SO4 each degree; this sum, 

 multiplied into the number of degrees from 50^ above zero, 

 gives the specific gravity of mercury at that degree, if de- 

 ducted when above 50 from 13*613, or added to the same 

 when below 50^. 



Thus at ISS'' above zero, which from 50° is 85% if the 

 sum *00804 be multiplied by 85, the product is *6834; 

 which subtracted from I^'6l3, the specific gravity of mer- 

 cury at 50% gives 12*9296, the specific gravity of mercury 

 at 135^ of temperature. 



At 200° the specific gravity of mercury is 12*407 



150 12*809 



335 . 12*929 



117 13*074 



100 13*211 



50 - — - 13*613 



14015 



50 below zero — — . 14*417 



52 14*433 



bQ 14*465 



'Then, to see if the alcohol in which the mercury was weighed 

 at G obtains by the same mode of calculation a. specific gra- 

 vity, according with the calculations at I, from the experi- 

 ments at H on silver, — observe the rule at I. 



At the temperature 5^^ below zero, the loss of weight is 

 59*9 on the quantity 1000; by which if it be divided, 16*694 



is 



