OF SULPHURIC ACID UPON VARIOUS CLASSES OF VEGETABLES. 
477 
Muriate of Fucusine. 
Muriate of fucusine is an extremely soluble salt, which crystallizes, when very con- 
centrated, in short slender needles arranged in stars. 
The Double Platinum Salt. 
When bichloride of platinum is added to a cold aqueous solution of hydrochlorate 
of fucusine, a crystalline yellow precipitate immediately subsides. But if the solutions 
of the two salts are hot, and especially if some spirits of wine are added to the mixture, 
the double platinum salt is slowly deposited in large broad four-sided prisms. These 
prisms are very thin, having two broad sides and two very narrow ones. They are 
usually united together at the one extremity, ^vhile the other is square and regular. 
The double hydrochlorate of fucusine and platinum does not at all resemble in ap- 
pearance the corresponding salt of furfurine, which, as formerly stated when crystal- 
lized ont of weak spirits, forms long needle-shaped crystals like those of carbazotate 
of potash. 
0’3733grm. salt dried in vacuo, gave 0’518 carbonic acid and 0'109HO. 
0'6595 grin, salt dried in vacuo, gave 0‘650 chloride of platinum and ammonia 
= 0*4085 nitrogen. 
0*640 grm. salt dried in vacuo, gave 0*580 chloride of silver=0*1434 CL. 
I. 0*416 grm. salt gave 0*086 platinum = 20*67 per cent. 
11. 0*5025 grm. salt gave 0*1035 platinum = 20*58 per cent. 
III. 0*409 grm. salt gave 0*840 platinum=20*53 per cent. 
Calculated numbers. 
Found numbers. 
30 C 
2250*0 
37-97 
37*84 
13 H 
162*5 
2*74 
3*21 
6 0 
600*0 
10 12 
9*70 
2 N 
350*0 
5*90 
6*18 
3 Cl 
1329*0 
22*45 
22*40 
Pt 
1233*5 
20*82 
20*67 
5925*0 
100*00 
100*00 
The formula of the double platinum salt therefore is C 30 Iljg N 2 Og-[-HCl-f P 1 CI 2 . 
The Acid Oxalate of Fucusine. 
This salt may be pretty readily prepared from crude fucusine by digesting it with 
an exeess of oxalic acid. The hot filtered solution deposits, on cooling, the acid oxa- 
late in long needle-shaped crystals arranged in stars. These crystals are usually 
coloured at first, but by repeated digestions with animal charcoal they are rendered 
colourless, when they have a silky lustre. They are not very soluble in cold water, 
but readily dissolve in boiling water and in hot spirits. Their solution is distinctly 
acid to test-paper. 
