23S 
MISCELLANY. 
aqueous solution of aldehyde of ammonia containing a few drops of free 
ammonia, the authors produced a beautiful new base, free from oxygen, 
and containing a large proportion of sulphur. This body, to which 
they give the name of thialdine, is obtained in large crystals, insoluble 
in water, but soluble in alcohol, and much more so in ether. It forms 
crystallized and well-defined salts with the acids. 
The analysis of these bodies gave the following results :-— 
Thialdine C l2 H 13 NS 4 • 
The hydrochlorate C 12 H 13 N S 4 , H CI, 
The nitrate C 12 H 13 N S 4 N O 5 , H 0. 
The following equation expresses the mode of formation of thial- 
dine : — ■ 
3 (NH 4 0, C 4 H 3 0)+6 HS=C 12 H 13 N S 4 +6 H 0+2 N H 4 S. 
Aldehydite of ammonia. Thialdine. Sulphide of ammonia. 
On substituting hydroselenic for hydro-sulphuric acid, the corres- 
ponding selenium compound, selenaldihe, is obtained, which, though it 
greatly resembles the former base, is far more liable to decomposi- 
tion.— Chemist. 
Chloride of Soda as a test for the presence of Guaiacum in resin of 
Jalap. By M. Smedt. — It has long been known that chlorine possesses 
the property of rendering resin of guaiacum blue. According to the 
author, the chlorides of soda and of lime also possess this property, 
and may be used for detecting the smallest traces of guaiacum resin 
when mixed with resin of jalap. In fact, two grains of a mixture of 
fifteen parts of resin of jalap, and one part of guaiacum resin, dissolv- 
ed in f£j. of spirit, specific gravity .825, gives on the addition of a 
single drop of solution of hypochlorite of soda (chloride of soda,) a 
green streak, which is deposited as a precipitate to the bottom of the 
glass, leaving the supernatant liquor of its original colour. 
The sensibility of this reaction is such, that the presence of one 
part of guaiacum resin in 320 parts of resin of jalap maybe indicated. 
M. F. Boudet has found that this test may be applied with equal ad- 
vantage for detecting the presence of guaiacum resin in scammony. — 
Pharm. Jour, from Jour, de Pharm. 
New Green Ink. By M. Winckler. — Dissolve 180 grains of bichro^ 
mate of potash in f^j of water; add to the solution, while warm, f^ss 
of spirit of wine, then decompose the mixture with strong sulphuric 
acid until it assumes a brown colour. Evaporate the liquor to one 
half, let it cool, dilute it with fjij of distilled water and filter it, then 
