74 REPORT—1849. 
Chloride of Barium and Sulphurie Acid.—The same quantities of chloride 
of barium and of water were taken as in the experiments with the neutral 
sulphates. A slight excess of sulphuric acid was employed to secure com- 
plete precipitation. 
Temperature of air’ .......... 178 18-4 151 9:8 
Increments observed.......... 3°44 346 3:38 3:42 
Heat for 1 grm. BaO, SO,...... 45°6 45°6 440 = 442 
Heat for 1 equiv. BaO, SO, ; 654°6 
Nitrate of Barytes and Sidpfeoie Acid.—As in the former experiments, 
half the usual equivalents only were taken. 
ie) ° 
Temperature of air.......... 15°0 153 
Increments observed .......- 1°50 1°49 
Heat for 1 grm. BaO, SO,.... 40°4 39°2 
Heat for 1 equiv. BaO, SO, .. 580°2 
Acetate of Barytes and Sulphuric Acid.—Half equivalents were taken in 
this case also. 
° oO 
Temperature of air .......... 12:3 125 
Increments observed ........ 1:90 1:91 
Heat for 1 grm. BaO, SO,.... 49°5 49°3 
Heat for 1 equiv. BaO, SO; .. 720°2 
be a 
Acetate of Baryies and Oxalic Acid.—11'2 grms. of acetate of barytes ands | 
5°33 grms. oxalic acid taken. 
Temperature of air.......... 12:3 128 
Increments observed ...... o> 19 119 
Heat for 1 grm. BaO, C,O, ., 22°1 21°8 
Heat for 1 equiv. BaO, C, O;.. 309°0 
Acetate of Lead and Sulphuric Acid.—Of the acetate 30°8 grms. taken and _ 
an equivalent of the acid. 5 : 
° 
Temperature of air....+..... 14°9 141 
Increments observed ......- "284 2°86 
Heat for 1 grm. PbO, SO, .... 28°0 29°2 
Heat for 1 equiv. PbO, SO, .. 542:0 
Nitrate of Lead and Sulphuric Acid.—Of nitrate of lead 26:26 grms. 
taken. / 
Temperature of air........ . 98 10°3 
Increments observed .......- 1°63 1°66 
Heat for 1 grm. PbO, SO,.... 16:3 16°4 
Heat for 1 equiv. PbO, SO, .. 309'8 
Acetate of Lead and Oxalic Acid —15°4 grms. of acetate of lead were — 
taken. 3 
Temperature Of ain, 5.2: --. 26 2 2 ens 9°8 
Tnerement GDSerVed<. ce ae aeekaieuns 2:12 4 
Fleattor 1 perm ep, CoO ce sinica ms 4°3 
Heat for 1 equiv. PbO, C, O,........ 7929 
These experiments can only be regarded as introductory to an extended 
and interesting subject of inquiry. With such limited data, it would be pre- 
mature to attempt to draw any general inferences. 
Solution of Metals in Nitric Acid—Every chemist is familiar with the 

