on the Halotd Compounds of Mercury. 429 
Retort and sublimate residue Ss 84,22 
Retort = : 64,78 
Sublimate residue 19,44 
Tube with lime before : 268,72 
Tube with lime after = 268,86. 
Water condensed 0,14. 
The gaseous mixture, reduced to mean temperature and pressure, amounted to 4,24 
cubic inches, of which 2,67 were absorbed by water. Of the remainder, 0,23 were 
the atmospheric air of the apparatus; there were obtained therefore— 
Cub. Inch. 
Ammonia 2,67 weighing 0,488 grs. 
Azote 1,34 0,404 
But the sublimed residue of calomel was dark-coloured from having absorbed 
ammonia; it must, therefore, be corrected by subtracting from it that quantity, and 
adding it to the ammonia actually obtained. Now it has been shown that 100 of 
white precipitate give 92,28 of calomel; therefore 20,47 should have given 19,135, 
which had absorbed 0,305 of ammonia. 
Summing up these results, we obtain— 
Calomel 19,135 
Azote 0,4.04 
Ammonia 0,793 
Water 0,140 
It is unnecessary to give all the details of other experiments similarly made ; the 
results will suffice. 
Expt. 3d gave for 12,14 white precipitate— 
Calomel 11,280) 
peak eee 12,14 
Water 0,080 
Experiment 4th furnished the calomel result, No. 2 of the table, page 426. But 
as some gas was lost in shifting a jar, the azote or ammonia could not be determined ; 
20,472 
the desiccating tube had not sensibly increased in weight. 
It is not necessary to use the above results for the chlorine or mercury constituents, 
as there have been already gotten numbers by simpler processes, and consequently 
less exposed to error. The difference is, however, very trivial. The product of 
water gives the the following :— 
Expt. Material. Water. Water per cent. 
1 22,21 0,22 0,990 
2 20,47 O,14 0,684: 
3 12,14 0,08 0,658 
4 19,42 0,00 0,000 
