no On the Edulcoratlon of Fijlj-Oil. 



or themfelves form coagukims or corrections with it, a f'olii.f' 

 tion of fait will loofen the bond and diflfolve the dole union ; 

 fo that the oil being feparated will float on the aqueous fluid, 

 ^vhile the earth, if any be in tl;e mixture, will be precipitated 

 and iink clnfe together to the bottom of the containing velVel. 



Sal catharticus, glauber fait, nitrum vitriolatum, tartar, 

 and other neutral falts, though they countera6l putrefaftion 

 in the mixed or folid parts of animals, feem to have little 

 effect on oils with refpcft to their edulcoration, and cannot 

 therefore he ranked aniongft the fubllances proper to be uied 

 tor that purpofe. 



Lead reduced to the fiate of a calx, either in the form of 

 minium or litharge, has a flrong edulcorative power on fcetid 

 oils, and is indeed applied to that end, with refpeit to one 

 kind of vegetable oil, for a very bad purpofe, confidering its 

 malignant qualities on the human body. 



In the cafe of train-oil, which will fcarcely ever be confi-^ 

 dered among the efculent kinds in this country, the fame 

 objection ag:;inll its ufe would not lie; and employed either 

 with or without heat, it is a powerful abforbent both of the 

 putrid and empvreumatic parts that occafiou the foetor. 



As, however, there may be fome prejudice againft its ufe 

 even in any way, and as it is not abfolutely nacefi'ary, I have 

 jiot given it a place among the ingredients of the procell'cs I 

 recommend. 



The ochrous earth of iron, commonly called red ochre, has 

 an abforbina:; power on the putrid parts of oil, but combines 

 fo (Irongly that the feparation is tedious even with the addi- 

 tion of brine: if, neverthelefs, it is added w4ien chalk and 

 hme have been feme time coumiixed with the oil, as in pro- 

 cefs the lird, it will promote the edulcorative intention, and 

 will fubfide along with them ; and, as it has fome advantage 

 without increafing the expenfe, unlefs in the mod inconli- 

 derable degree, its ufe may be expediently admitted in that 

 procefs. 



Eflential and ethereal oils are applicable to the prevention 

 of putretaftion in the mixed and iolid parts of vegetables, 

 but are not fo to the edulcoration of fcetid oils; and if they 

 had the defired eifeft, they would not, on account of their 

 price, aniwer the commercial end, unlefs the due effeft was 

 produced by adding them to the oils in a very fmall quantity. 



The fame holds aood of fpirits of wine as of eflential and 

 eihereal oils, bo;h with refpeit to their efficacy and the ex- 

 penfe. 



Water has an edulcorative aftion on fcetid oils by carrying 

 oft tb.c inofl putrid parts of the gelatinous fluid or bile, in 



which. 



