Potassium as an Oxydizing mixture. 203 
powdered lead. As the mean of several weighings, it was found 
that the charge of nitrate of barium weig grm., tha 
of chlorid of barium 0°12 grm., that of perchlorate of potas- 
sium 0-1 grm. and that of chlorate of potassium 0°08 grm 
For the experiments made “at the temperature of boiling 
water,” long, narrow open tubes, to condense aqueous vapor, 
were fitted to the mouths of the test-tubes by means of perfor- 
aa corks and the test-tubes were kept immersed in a bath 
oiling water. By means of pasteboard er the tops of 
the tubes were protected from the steam and heat of the bath. 
The results of the experiments may be cabulitoll as follows :-- 
£ 
Nitrate of Barium. 
I. Experiments made at the ordinary eaten of the air, 
No. of drops of the solve: No. of of the solvent 
Name of solvent. quired to dibsolye theo! geharge required fo siseive one 
(=0'15 grm.) BaO, N205, 0, N205. 
1 
Chlorid of ammonium, ____--- 104 18°67 
Ammonia water (strong), ----- 110 14°67 
Acetate of sodium, 110 14°67 
Ammonia water (weak), 2... 124 16°50 
Acetate o oni, 2... 130 47°35 
Acetate of coppers 22/5 aris 130 17°33 
rape-suga . 140 18°67 
Nitrate of ammonium, ------- 180 24°00 
eiehety acid (dil)... ees 210 28°00 
tic acid 220 29°00 
Ni itrie acid "(dil), Insoluble. 
II. Experiments made at the temperature of boiling water. 
Acetate of ammonium, ------- 33 4°33 
Water 35 4°67 
Chlorid of ammonium, ees 35 4°67 
Acetate of sodit um, 40 5°33 
Ammonia am {etrong), wanes 43 5°67 
Acetate of copper). ns outs 45 6-00 
Chiorid of Barium. 
I. Experiments made at the ordinary temperature of the air. 
Name of solvent. aired to disso solve the he shares Peculzed to dineive one 
ES (= 
_ Water. a 
Ammonia + water baht ~---- 30 5°00 
Je ae 32 5°33. 
d Chlorh dni acid (dil), ..--<- 82 5°33 
5 Grane y one! t ‘3 = oguEs oe 503 
cdtate of ammoniu 36 6 
; Myc A+ 
Chlorid of ammonium, ...---- 36 6°00 
Acetate of copper, ...-------- 38 6°33 
Acetate of ae Se a ee 40 6°67 
cetic acid, ‘ 48° 8-00 
