478 REPORT—1868. 
with oxalic acid, was evaporated to dryness, and the residue treated with 
alcohol of 20 per cent., which dissolves the salts formed synthetically, and 
leaves pure oxalate of sodium, as the following analysis shows :— 
-522 erm. of the residue gave °5475 grm. Na,SO,, or "1774 Na. 
The salt therefore contained 34:11 per cent. Na. 
Oxalate of Na contains 34°33 per cent. Na. 
The solution in alcohol of 20 per cent. was evaporated to dryness, and 
heated till it ceased to lose weight in a weighed crucible, a little absolute 
alcohol being added to facilitate the drying of the deliquescent residue. 
Weight of organic salts =22°32 grms. 
Now 23 germs. sodium correspond to 112 sodium ethylearbonate. Hence 
the weight of ethylearbonate corresponding to 9°90 grms. sodium is 48-21 
grms. 
' Hence as from 17-43 grms. sodium are obtained 
22°32 erms. organic salts, and 
48-21 grms. sodium ethylcarbonate 
5 ? 
from 100 grms. sodium would be obtained 
128-06 grms. organic salts, and 
276°59 grms. sodium ethylcarbonate. 
13. If, now, the organic salts be decomposed by a solution of oxalic acid 
in alcohol of 60 per cent., containing just sufficient oxalic acid to convert 
7-53 grms. sodium into acid oxalate, the sodium is converted into acid oxa- 
late, and the acids remain in solution. On distilling the acid solution, 
alcohol goes over accompanied by the volatile acids. If water be added to 
the retort till the liquid which distils over is very faintly acid, the distillate 
contains the whole of the volatile acids, and the fixed acids remain in the 
retort. 
The acid distillate required for neutralization 148 cub. centims. standard 
caustic soda, which are equivalent to 3-40 grms. Na; therefore, 3:40 grm. 
Na existed in salts of volatile acids. Now 7:53 was the whole quantity of 
sodium in organic salts. 
Hence, of the sodium in organic salts, 
45:15 per cent. existed in salts of volatile acids, and 
54:85 iy 45 ‘a fixed acids. 
14. The solution of sodium-salts of volatile acids was evaporated to dry- 
ness, and dried till it ceased to lose weight. 
Weight of residue=10°37 grms. ; 
and as the total weight of organic salts was 22°32 grms., 
11-95 grms. were salts of fixed acids. 
Hence, of the total organic salts, 
46-46 per cent. were sodium-salts of volatile acids, and 
53°54 * 5 :; fixed acids. 
15. The results of the examination of the remaining bottles will not be given 
in detail. They are collected in the following Table, the first vertical 
column containing the results of the examination of the first four bottles, 
and the other columns those of the last four bottles :— 
