Atomic Volume and Specific Gravity. 515 



converted into ZnO, SO3 + NH3; 267 grains of which (the 

 fourth of an equivalent), thrown into turpentine, caused an 

 increase of 10*8, which gives 39*5 as the volume of the salt, 

 and 2*479 for its specific gravity. 



Ammonia-Sulphate of Mercury, HgO, SO3+ HgAd4-2HgO 

 = 486-0. — This salt, which Kane calls the Ammonia Turpeth, 

 was prepared by heating turpeth mineral with ammonia un- 

 til it became changed to a heavy Avhite powder. The eighth 

 part of an equivalent, 60*7;> grains, immersed in water, caused 

 an increase of 8*3 in two experiments ; this makes the volume 

 of the compound 66*4, and its specific weight 7'319. 



Ammonia- Sulphate of Silver, AgO, SO3 + 2NH3 =190-86. 

 — This salt was obtained in the usual way, by dissolving sul- 

 phate of silver in ammonia and crystallizing. The first speci- 

 men tried w^as in small, indistinct crystals, in the second in- 

 stance the crystals were large and well-defined. 25-62 grains 

 gave an increase of 8-6, and 37*7 grains of the better specimen 

 of salt gave the increase 13*2. wiasiuo ^cl boTBa-nrj gjBw 



Ij. Ago, SO3 + 2NH3, voLof sair 64-^'"ff;r,;^^^ 



■gal " 



^jMf .i>iiio,:.ri'ii. lo .)ifA* biu. iuiif.v to jdMatif?" ±Zri.''>I Ti 



.OiiO .! .':■;.-■- '^o <;lr:rni()^ W*#ih-»^orr n-W^- '*>* 2-918, rf^o 

 Ammonia-Chromate of Silver, AgO, CrOg + 2NH3 = 202'8. 

 -i-This salt was obtained in fine large crystals, in the same 

 manner as the last salt. On immersing 25*35 grains in tur- 

 pentine, the increase was 8*3, and on treating 50*7 grains te 

 the same way, the increase was 16-5. ^'V 



aim jjvvo i . li -/ ' Sp.gr. I'Sf 



')i ai J:»jj AgO, €r03+2NH3,voLjof salt 66*4 ... 3-054'iiiri 

 ohilSqg 8}i bm ,9*£» «QHF. f gllVl + 66'0 ... 3-073 nlo/ 



Mean . . 66*2 ... 3*063 "" 



Ammonia-Nitrate of Copper, CuO, NOg + 2NH3 = 128-4. 

 — On dissolving 64*2 grains, half an equivalent, in 1000 grains 

 of water, the increase was 32*0 in two experiments at a tem- 

 perature of 60°; this makes the atomic volume in solution 

 64-0. On putting the same quantity into turpentine, there 

 was a rise in the stem, in three experiments, of 340, 34*0, 

 and 34-8 ■''^"^^'^""'■' ■ i''''^^" '" '^'l'- n-jir- -m^.. ■ -.f.. 



I. CuO, NO5 + 2NH3, vol. of salt 68-0 *.. 1-888 



II. ... ... ... 68-0 ,.. 1-88^ 



IJI. ^9mS ... 1-845 . 



^^j^;. Mean . . 68-5 ... 1-874 



Ammonia- Sub-Nitrate of Mercury, HgO, NO5 + 2HgO 

 + NH3 = 399-7. — This salt was prepared by adding a dilute 



