222 MR THOMAS HENRY ROWNEY ON A NEW SOURCE 
Caprate of Baryta. 
The baryta salt was obtained by adding Ba Cl to an ammoniacal solution of 
capric acid, the precipitate was filtered and washed with cold water. It is soluble 
both in water and alcohol when boiled with these liquids, and crystallizes out 
from these solutions, on cooling, either in needle-shaped or prismatic crystals; 
the crystals obtained from the alcoholic solution are sometimes of considerable 
size. This, as also the other salts of the alkaline earths, and the silver salt, are 
insoluble in water after having been dried, as they float on the surface of the 
water and repel it; but by first moistening the salt with alcohol, they may be 
again rendered soluble in boiling water. They are also very difficult to powder 
and mix for analysis. 
The salt analyzed was crystallized from water, and dried in the water-bath at 
212° Fahr. The baryta was determined as BaO,SO,, and the combustion was 
made with chromate of lead. 
{ -2935 grammes of baryta salt gave 
1415 
Il. ) .o195 
of BaO, SO,. 
-4375 grammes of baryta salt gave 
of BaO, SO,. 
‘2411 grammes of baryta salt gave 
of carbonic acid, and 
of water. 
-2335 grammes of baryta salt gave 
III. { 4410 
1750 


IV. ¢ -4245 of carbonic acid, and 
1732 of water. 
Theory. Found. 
Dennen ee ee 
I; gt III, DV Mean. 
Cre oe AXD 50:08 nae 73 49-88 49°58 49-73 
Bs 19 7:93 Lae a 8-06 8-24 8-15 
is 24 10-02 ade wee At Bae Be 
BaQ. 76:6 31:97 31-65 31:88 nat ee 31-78 
239°6 100-00 
Caprates of Lime and Magnesia. 
These salts crystallize and have similar properties to the baryta salt, but they 
are more soluble both in alcohol and boiling water. No analysis was made of 
the lime salt, but the base of the magnesia salt was determined. The salt em- 
ployed for this purpose was crystallized from water, and dried at 212° Fahr. The 
magnesia was determined as 2 MgO, PO.. 
3687 grammes of caprate of magnesia gave 
{ aias ... of 2Mg0, PO,. 
The formula C,, H,, 0,, MgO requires 11:25 per cent. of MgO, and the per-centage 
obtained by analysis was 11°37 MgO. 
% 
: 
t 
, 

