PREPARATION 01- P. ADICAl VIKKGAK: Sf 



marrow of beef and tii'low. I propofe to repeat them witft 

 thefe different fatty ftrbftanccs, and think, even according to 

 the experiments of Crell, that I ihall obtain the fame remits. 

 I have not as yet examined all the properties of the febacio 

 acid ; but it is my intention to flady them with care, and give 

 Hi) account of them to the clafs. 



VIII. 



Improvement in the Art of preparing Radical Vinegar, By 

 Cit. Y. Peres, Jun.* 



1 



HE experiment which enabled me to ascertain tlie real 

 difference between the acetous and the acetic acid, and after- 

 wards to propofe to the learned a new theory of vegetable 

 acidification in general, may be of great fervice in the art of 

 preparing what is termed radical vinegar ; or, to fpeak more 

 accurately, it ought totally to change the procefs ufed for prei 

 paring this fubitance. 



The procefs at prcfent in ufe, confifts in diftilling the acetite Obfervations on 

 of copper in large fpherical vetlels of ilone ware. By taking d« ^illation of 

 i n e ,, . • t r i • acid from acctite 



the greateft care, a fmall portion is obtained of this radical of copper. 



vinegar § fo much ufed in medicine and lor domeftic purpofes. 

 The difficulty of checking the expansion of this product, is an 

 inconvenience which, being dependent on the nature of the 

 procefs itfeif, has at all times been felt. Some improvements 

 have been propofed ; but as the nature of the operation was 

 not underftood, thele improvements produced fcarcely any 

 advantage, and die procefs itill remains very defective. It is 

 eaty to obfervc, that the violent heat which is ufed, is much 

 more than fufh'cient for depriving the acetous acid of its car- 

 bon, and that it muft reduce a portion of it to its firtl elements. 

 I do not hefitate to atlert, that at leaf* half the radical vinegar 

 is loft : The large quantity of gas that is obtained, incontro- 

 vertibly proves the truth of this afiertion. 



I have formerly (hewn, by various deductions from earlier Radiol v?negar 



experiments, that radLul linesar is nothing: but acetous acid is deduced *° J be 

 . . . P . *, acetous acid de- 



deprived ot carbon. I have fhewn, that the ordinary procefs pr'ntd of carbon. 



♦ In a letter to the Editor cf the Mag. Encyclop. 



for 



