Atomic Voiurne and Specific Gravity, 



m 



I loqu giafid aniTo JcJuob \iih '. 



Solid 

 volume by 

 expe- 

 riment. 

 H int .->■ 



SoUd 



volume by 



theory. 



Specific 

 gravity by 

 expe- , 

 riment. 



Specific 



gravity by 

 theory. 



Sulphate of ammonia ~'<l'>'vd"J)j 



Sulphate of copper and ammoma.i'.... 



Sulphate of zinc and ammonia 



Sulphate of magnesia and ammonia... 

 Splphate of iroB and ammonia., >,,.,.i.,. 



105-4 

 105-2 

 .105-8, 



103-2 

 105-2 

 105 2 1 



J ^696 

 ,1-891 

 1-887 

 1-721 



1-848 



1-691 

 1-900 

 1-901 

 1-721 



■■'.-■■■' • .■!:iiai, ' ;;i: ■;;; - -/jrurro/ 



As one of the members of the group of double salts here 

 described takes up no space of itself, it became of importance 

 to ascertain the volume of the salt when deprived of water, 

 and also the space occupied by the double salt reduced to the 

 same state. In this examination it was quite unnecessary to 

 obtain the volumes in solution, because it was obvious that 

 salts not occupying in solution a greater volume than that due 

 to their water of hydration, would, in their anhydrous condi- 

 tion, take up no space at all. In fact, we had ascertained that 

 not only was there no increase in dissolving such salts in 

 water, but that actually there was a contraction if the water 

 were in large proportion to the salt; when this is not the case, 

 the increased expansibility of the solution prevents the con- 

 traction being observed. 



In the following examination will be found almost all the 

 salts previously described in their hydrated condition, with 

 the exception of the phosphates and arseniates, which we re- 

 serve for another paper. 



Sulphate of Magnesia, MgO, S03= 60-86.— Half an equi- 

 valent of this salt, 30*43 grains, thrown into turpentine, 

 caused an increase of 110 ; but in a second experiment the 

 increase was 11*5, the temperature in both cases being 65° 



lii oJniMgO, SO^;voi;j<if'«»It! .22iO lifieJofg-'yifeS'^i '^golfinxi 

 ijHt ^niHfDaavqdi 8'fDdinutt yd.t 23'0 ... 2'646 'aj ovodii 



-'jfriniiiv 



'.22-5 ... 2'706 



Siilphate of Zinc, ZnO, SO8=80'43. — Half an equivalent 

 of this salt, 40*22 grains, projected into turpentine, caused an^ 

 increase of .11*05 »nd, in anotbeir experiraent^QfJiO'S., ,.,,,,, j,,., 



■^ ' ' • Jiv'i' -ii.i'>' .y>\vi^^i\')iii ffifi-vTi-'sutr.vv (Pp'';g>'--';-!if)d nfiaia 

 -^OTh/dJ^"^' ^^3» vol. of salt 22^),j.iis.,„ ,3*639 , .bv adi 

 jdj biifi ,-m'V.^ .. .?"i->... ^y^l v" 3'7g3 ,,j 'jii-Ak\\ui 

 -uviupa a Mvf zaiM^^i\tA'iiiA^j.v3'l'%B) ... , 3*68l2jli5a alduob 



Sulphate of Copper, CuO, SOgrr 79*88. — Half an equiva- 

 lent, 39*94 grains, of the salt placed in turpentine, caused 

 in several successive experiments an increase of exactly IIW^ 



