Chemical Notices. 369 



miscellaneous; 



1. Hildebrandt, in a feries of experimeats on the aftlon of 

 both the carbonate and pure ammonia on copper, found no 

 folution take place without the prefence of atmofpheric air. 

 Hahnemann had afcribed the aftion to the carbonic acid ob- 

 tained from the air, but this he has proved is without foun- 

 dation. If the oxide of copper is ufcd, a bhie folution is pro- 

 duced without theadmiffion of the atmofphere. 



2. According to Vauquehn, the boracite called magnefio- 

 ealcareous borate by the French chemills, is not a triple 

 compound, confiding of boracic acid, magnefia and lime. 

 When.tranfparent and cryftallized, he finds in it none of the 

 latter fubftance, but only boracic acid and magnefia. When 

 opake, it is rendered fo by lime, not in chemical combina- 

 tion. 



3. An analyfis of the waters of Plombicrs, by Vauqqelin, 



gives per pint : 



I gr. i-6th of fulphurated foda. 



5-8ths of muriated foda. 



2-3ds of filex. 



i-4th of carbonate of lime. 

 1 gr. I- 1 2th of carbonate of foda. 



i-half of animal matter. 

 This animal matter is like albumen, and is only held in 

 folution by the foda; as an acid inftantly feparates it, and 

 caufes it to precipitate. 



4. Brugnatelli recommends nitric ether to be prepared in 

 the following way:— Into a tubulated retort put one ounce of 

 fugar and two ounr^es of alcohol : to the retort adapt a large 

 receiver covered ^ith wet cloths; fecure the joint with pafltd 

 paper, then pour in three ounces of concentrated nitric acid 

 by the tubulure: ebullition takes place, and an excellent ether 

 of an orange colour palTcs into the receiver, which will not 

 redden vegetable blues: as foon as the ether is all received, 

 nitrous gas is evolved: the receiver nuift be immediately 

 changed. By treating the refiduary fugar with more nitric 

 acid, oxalic acid very pmc will be- obtained. 



5. Mr. Dabit, in the Annalcs de Chlmie, No. 127, gives an 

 account of fonic cxperiuH-nts on the rcfiduum of fulphuric 

 ether, from which he is induced to believe, that he has dif- 

 covered an acid of fulpluir in a fiate of oxygenation interme- 

 diate between the fulphuric and fulphureous acids. As yet 

 he has not obtained it in a free (late; and' he founds his 



Vol. XIV. No. j6. A» conclufions 



