66 



BARTTIC SALTS DECOMPOSED BT SODA. 



Alcohol slight- 

 ly etherised. 



More ether. 



Phosphoric 

 ciher 



most resem- 

 bling sulphu- 



therraometer bein^ at 10<^ [54|°]; dissolved in eip^ht or ten 

 parts of cold water; evaporated quickly; boiled at 30^ 

 [99 P] ; dissolved resins and phosphorus; burned v/jth a 

 whitish flame, leaving a carbonaceous residuum, and with- 

 out any trace of acid appearing from its combustion on the 

 suface of water. 



The other product of the rectification was alcohol, slightly 

 etherised, This alcohol, passed again in the same manner 

 through the phosphoric acid employed in the experiment, 

 gave rise to the formation of a fresh quantity of ether in 

 every respect resembling the first. 



From these facts, and on exarhination of the products 

 submitted to the inspection of the class, it appears to me, 



1st, That phosphoric acid is capable of transforming al- 

 cohol into a perfect ether, by means of the apparatus I em- 

 ployed, and the precautions 1 have mentioned : 



2dly, That, of all the different ethers known, the ether 

 resulting from the action of phosphoric acid on alcohol has 

 the greatest analogy to sulphuric ether, with respect to its 

 properties, and the phenomena observed in preparing it. 



XI. 



Acetate of 

 soda said to be 

 decomposed 

 by baryies. 



Solution of ba- 

 rytcs added to 

 acetate of soda, 

 cryitals fall 

 down. 



Remarks on the Decomposition of Acetate of Barytes hj Means 

 of Soda; hy Mr. D'Arcet*. 



JLn N°. 180 of the Annales deChimie, p. 286, Mr. Perpe- 

 res, speaking of the formation of acetous acid in cases of 

 indigestion, says, that, to ascertain the presence of this acid, 

 h? saturated it with pure soda ; afterward decomposed the 

 acetate of soda by means of barytes ; and having thus set 

 the soda free, dissolved it in alcohol, which, uniting with 

 the water of the solution, precipitated the acetate of barytes, 

 that had been formed. The result of this experiment ii 

 certainly inaccurate, as the following details will show. 



Take a hot saturated solution of barytes, pour it into 

 acetate of soda, and immediately an infinite number of ht- 

 tie, shining, and iridescent laminae will fall down. If these 



« Annales de Chimie, Vol. LXI, p. 2-18, March 1807. 



he 



