122 Scientific Intelligence. 
fact that only 87-4 parts of gailic acid could be obtained for 100 of 
tannin, leaving 12°6 parts unaccounted for, except by the presence of 
Liebig some years since, pointed out the fact that tannic — by 
taking up the elements of water, — yield ite acid and glucose or 
acetic acid, C,, H, O,,~-2HO=2C, H, O,+C, H, O,. The for- 
mula of tannin appears from its compounds with baryta to be at least 
twice the above. Berzelius hasdescribed asalt which is C,gH 14Ba,0,,, 
besides an acid one not analyzed; if, as is not improbable, it is 
24 Ogg, it may combine with six equivalents of water and form 
air and dilute acids, Malaguti has shown that glucose is oxydized a 
ewe ane cid. 
A fae which militates strongly against the view of the isomerism of 
tannin one gailic acid, is the observation of Pelouze, that a solution of 
tannic acid confined over oxygen, was converted into gallic acid, while 
the oxygen was replaced by an equal volume of carbonic acid gas. 
iquet indeed denies that the presence of oxygen is essential to the 
pen but the reaction without it will probably: be like that produced 
by the action of the various ferments. The subject i is seer” kg and 
seems still open for investigation. ] He 
On two new Alkaloids obtained from Aldehyde ; bye “Wauter 
ial Liesie, (Compt. Rendus des v. de Chemie for May, from Annal. 
der Chem. und Pharm., t. Ixi, p. 1.)—-When a solution of pure aldehy- 
date of ammonia in twelve or sixteen parts of water is mixed with a 
few drops of ammonia -and a gentle current of sulphureted hydrogen 
hol and ether. By the spontaneous evaporation of the solvent, the 
new substance is obtained in tt a tables of the form of sele- 
nite and having a high refrac 
This constitutes a new alkaloid to shin the authors have given the 
name of thialdine. It is searcely soluble in water, but dissolves readily 
in alcohol and ether; it fuses at 107° F. and is volatile at ordinary 
temperatures. It may be distilled with the vapor of water, but a 
is decomposed by heat; its taste is at first aromatic but afterwerded - 
agreeable ; at 64° F., its specific weight is 1-191. 
ith a solution of acetate of lead it gives after some time a 
precipitate which gradually becomes red and at last black ; ath nie 
trate of silver, the reaction is similar; when heated with a eoluddd of 
this salt, sulphuret of silver separates and an inflammable vapor e 34 
having the characters of aldehyde. Distilled with nae of lime, it 
— a substance having the odor of quinoleine. z 
3 composition of thialdine is C,, H,, NS, ; three equivalents ¢ of 
yde, one of ammonia and four of sulphureted h 0, 
2ments of one a of rage and six of f water, 30 2 
TNE, ae eH 1 NS,+6HO. 
