J 50 On the Contraction ivhkh lakes place in Mcrcurr/ 



At the following temperatures water is of the specific gra- 

 vity stated: 500^ r -8990 



150 ^, .f)3()6 



135 -,-_ 'iHli> 



117 '9537 



]{)() '(jc^Gl 



' 50 ^ 1-0000 



and as '1080 is the sum of difference in 150^, this sum 

 *0007£? expresses nearly the variation in each degree. 



Wc find from !he data obtained in these experiments a 

 rat'fn of contracimn between mercury, alcohol, water, ai>d 

 silver of e(|ual volume. 



Mercury at L is -00804 



Alcohol at T is '0004943 



Water from F above -0007200 

 Silver at II is •0006114 



, What will he the proportionate contraction of each, that 

 gf mercury being supposed ICO? 



As the increased specilic gravity of mercury is to the sup-^ 

 posed number, so is the increase4 specific gravity of either 

 to the number required. 



( 0004943 = ()'144 ContraciionofalcohGl 



IfOOS04bel0O,wliatwilU;OO372OO=: 8-955, waler 



/0006j14==7u04 silver 



of equal voiun.e, when th.'at of macury is JOQ.. 



^'^ If- we suppose water to be 1 OOOO .7 ^ '* 



*" ' ' then mercury will be IV 1^^^ ■ 



alcohol' • <^^ ^^'^-i'es^S 

 silver - ■'•6491' 



As in the hydrostatic balance the comparison relates to 

 Qqual vahiines-u^' the thing weighed, and the fluid in which 

 . it is weighed ; What will be the ratio of contraction oi' eqi/al 

 weights of each of the above ? 



As the specific gravity of cither is to the specific gravity 

 of mercury, so is the ratio of contraction of equal voKmics 

 to the ratio of contraction of equal weights. 



As .*8M1 : 13613 :: 0004943 = 008265 alcohol. 

 I As 1-000: 13613 :: 0007200 = OO96OI AvateiV 

 As; 10'36i' : U6I.3 :; 0C06i 14 =000803 sifW. 



OOSO'U) mi^r-eufy. 



' Table 



