484 



.vVvM'^^^r^i^' Play fair and Joule\(?f^\K 



moistened with turpentine into the volumenometer, and employ 

 this to break the numerous air bubbles which arise on im- 

 mersing the salts. The following estimations were taken with 

 great care, but from this source of error may possibly be in- 

 accurate. '^ 

 The eighth part of an equivalent (21-49 grains), immersed 

 in turpentine and treated as described above, gave results 

 varying from 9-8 to lO'O, the mean result being 9'9. 

 •Ic(,"b.' ... 0-SL^ Sp.gr. 

 Al^Og^SOg, to4'^:=of salt 79-2 ... 2-171 



Sulphate of Alumina and Potash, A\c^0^3S0^ + KO, SO3 

 = 259-36. — The eighth part of an equivalent (32-42 grains) 

 of anhydrous alum, immersed in turpentine and treated as 

 described in the case of sulphate of alumina, gave an increase 

 o€,l^;^,ftnd 14-6 ia two experiments. .n^ij^„gj,.,(j 



5 a' 



, I. Alum, vol. of salt 



u. ... ... 



116-0 

 116-8 



2-236 

 2-220 



... 2-228 



S03 = 238 2.— The 



,,,.,,?! &||§„^| "llMean . . 116-4 

 Ammonia Alum, AI2O33SO3 + NH4O 

 eighth part of an equivalent of this salt (29*77 grains), tre^t^J^a 

 as in the previous cases, gave an increase of 14*6 in twotei^faa 

 periments^ ,. 1 ,: ^ ^ ^^ . :"" ^^j^"^ 



Ammonia alum, vol. of salt 116-8 ... 2-039 licdqfu^ 



' ^ ■ 'ii&dQhsf'. 



Carbonate of Soda, NaO, C02 = 53-47. — The equivalent otn 

 this salt, thrown into turpentine, gave an increase of exactly,"^ 

 22-0, which makes its specific gravity 2*430. '.^ 



Chloride of Magnesium, MgCl = 48-12. — The anhydrouSua 

 chloride of magnesium used in the experiment was made hf;, 

 saturating equal portions of muriatic acid with magnesia an4i 

 ammonia, mixing together, evaporating to dryness, and heattufi 

 ing to redness. 



Half an equivalent (24*06 grains), thrown into turpentin^ 

 caused an increase of ll'O in one experiment and of 11*1 ii^v'd 

 a second. f „ 



,,.,,,,,,,.,,,, I. MgCl,vol, 



*:^-?l ... I ..}^' '" ^?^ ,0?? 



'',". j ... : Mean '. 



CMorlSe of Calcium, CaCl = 55*92. — This salt was ren-'jj 

 dered anhydrous by fusing it in a platinum crucible for somfiilD 

 time. 28 grains of the fused salt, thrown into turpentined'^ 

 caused an increase of 1 1-3 at a temperature of 63°. ^J^. 



mh 



22-1 



2-177 



i'lrfi 



iu>j 



ijOi 



