Chemistry and Physics. 409 
6. On Isomorphism; by MM. Laurent and Berzetivs, (Ann. de 
Pharmacie et Chimie, April, 1847.)—Certain bodies are known in 
which, although containing the same elements in the same proportions, 
and presenting the same crystalline form, the relative order of the ele- 
ments is not the e.* Thus we have— 
A hydrobromate of chlorinized cinchonine: C, ,(H,, Cl,)N, O,H,Br,. 
A hydrochlorate of brominized cinchonine: C, ,(H,, Br,)N.0,H,Cl,. 
These two salts have the same composition and are isomorphous. 
arates from the one, brominized cinchonine, and is converted into a 
chlorid, while with the other salt, it precipitates chlorinized cinchonine, 
and forms a bromid of potassium. 
This important fact observed by M. Laurent, is one of those which 
demonstrate most forcibly the falsity of the dualistic theories which 
have been applied to organic chemistry. 
- Laurent concludes his remarks upon this point by observing, “ If 
the partisans of the electro-chemical theory do not find that I have 
brought proofs enough in support of my thesis, I beg that they will 
Indicate what experiments are still necessary to persuade them that 
they are in error; as for myself, I do not know what farther proof it is 
33 
7. On the Products of the Action of Cyanic Acid upon Alcohol and 
Aldehyde ; by MM. Liesic and Wouter, (Jour. de Pharm. et de 
ve 
sel, deposits mamillary crystalline masses of a salt which is the allo- 
Phanate of baryta, while the liquid holds alcohol in solution. This salt 
San alkaline reaction, and is sparingly soluble in water; when its 
Solution is heated, it is decomposed below 212° F. ; all the baryta is de- 
Posited in the form of a carbonate, while at the same time carbonic 
acid is disengaged with effervescence, and the liquid contains nothing 
urea, 
ete 
but pure 
~* Compt. Rendus de I’Acad, t. xx, p. 1587, et t. xxiii, p. 811. 
