1818.] 



the Atoms of Chemical Bodies. 



441 



Atoms of acid, base, 

 . and water. 



199 Bisulphate of potash .... 2 



200 Sulphate of soda 1 



201 Hydrous sulphate of lime. 1 



202 Anhydrous sulphateof lime 1 



203 Sulphate of barytes 1 



204 Bisulphate of barytes ... 2 



205 Sulphate of strontian .... 1 



206 Sulphate of magnesia ... 1 



207 Sulphate of glucina 1 



208 Bisulphate of glucina .2 



209 Subsesquisulphate of 



glucina 



210 Sulphate of alumina 1 



211 Sulphate of iron 1 



212 Persulphate of iron 1 



213 Tripersulphate of iron. . . 3 



214 Sub-bipersulphate of iron 1 



215 Sulphate of nickel 1 



216 Sulphate of cobalt 1 



217 Sulphate of manganese . . 1 



218 Sulphate of zinc 1 



219 Sulphate of lead 1 



220 Bisulphate of copper ... 2 



221 Subsulphate of copper. . . 2 



222 Sulphate of bismuth .... 1 



223 Subsulphate of bismuth . . 1 



224 Sulphate of mercury . . . . 1 



225 Turpeth mineral, or per 



sulphate of mercury . 



226 Bipersulphate of mercury. 2 



227 Sulphate of silver. ...... 1 



228 Sulphate of platinum .... 1 



+ 



+ 

 + 

 + 

 + 

 + 

 + 

 + 

 + 

 + 



2 s + 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



1 s + 



s + 



s + 

 s + 



Weight of 

 a particle. 



p 16-000 



s + 10 water 9-000 



I + 2 water 8-625 



/ 



b 14-750 



b 19-750 



str 11-500 



m + 5 water 7-500 



gl 8-250 



si 13-250 



gh 19-750 



7-125 



9-500 



15-000 



25-000 



25-000 



9-375 



9-625 



9-500 



10-125 



19-000 



20-000 



40-000 



14-875 



34-625 



31-000 



a 



i 



i . . 



i . . 



i . . 



n + 



c + 



m + 



SB + 



/ .. 



+ 7 water 



7 water 

 7 water 

 5 water 

 5 water 



c 



c 



b 



b 



m 



+ 10 water 

 + 6 water 



m 32-000 



m 37-000 



si 19-750 



pi 28-625 



Article V. 



On the Action of Sulphurous Acid Gas on Sulphuretted Hydrogen 

 Gas. By Thomas Thomson, M.D. F.R.S. 



It was first observed by Mr. Kirwan, that when sulphuretted 

 hydrogen gas was mixed with sulphurous acid gas, the bulk of 

 the two gases diminishes, and a quantity of sulphur is deposited 

 on the sides of the jar. He found that five measures of sulphu- 

 rous acid and six measures of sulphuretted hydrogen, when x thus 

 mixed, were reduced to three measures.* On turning to Messrs. 



♦ Phil. Trans. 1786, p. 1 18. 



