FOR OBTAINING CAPRIC ACID. 
*3759 grammes of substance gave 
of carbonic acid, and 
‘I. <¢ -9558 
3930 
of water. 
21 



-3176 grammes of substance gave 
II. < -8080 of carbonic acid, and 
+3330 of water. 
Theory. Experiment. 
eS 
i Il. Mean. 
Cy 120 69°76 69°35 69°38 69°36 
Hee 20 11°62 11-61 11°65 11-63 
0, 32 18:62 ce 
172 100-00 
Caprate of Silver. 
This salt is formed when AgO, NO, is added to a slightly ammoniacal solu- 
tion of capric acid. It is insoluble in cold water, sparingly soluble in boiling 
water, and is deposited again on cooling in needle-shaped crystals. It is more 
soluble in boiling alcohol, but the solution becomes dark-coloured, and the crystals 
deposited from it are also dark-coloured. Gorexry also observed this change. It 
is very soluble in ammonia, and if the ammoniacal solution be kept in a warm 
place, so as to drive off the ammonia, a crystalline salt is obtained; but not hay- 
ing a sufficient quantity, no examination of this compound was made. The silver 
salt whilst moist is rapidly blackened, if exposed to bright daylight; but after 
drying it may be exposed to the light without undergoing any change. The 
silver salt for analysis was precipitated and washed during the evening, dried in 
vacuo over sulphuric acid, the receiver being covered with a cloth, to prevent the 
access of light to it; it was then dried in a water-bath at 212° Fahr. 

I *2485 grammes of silver salt gave 
* (0951 of silver. 
Il -3050 grammes of silver salt gave 
"1175 of silver. 
lr ‘2715 grammes of silver salt gave 
~ 1. -1050 of silver. 
-4265 grammes of silver salt gave 
IV. < -6650 of carbonic acid, and 
-2617 of water. 
-3402 grammes of silver salt gave 
V. < °5282 of carbonic acid, and 
2062 of water. 
Theory. Found. 
—_—_—— ne nn sn ee a 
I II. Iii. IV. Wee Mean. 
C,y 120 43-01 42°52 42°34 42-43 
His 19 681 6-81 6-73 6-77 
0, 32 11-47 Boe aa aa ate eats 
Ag 108 38-71 38:27 38°52 38°67 38°49 
279 100-00 
