id 



PURIFICATION OP FISH-OIL, 



proportion of pearl-afhes diflblved in water be added, and tke 

 mixture feveral times flirred betwixt the times of boiling, it 

 will facilitate the operation. The time of boiling may be alfo 

 much fhortened, if the chalk, lime, and pearl-afhes, be added 

 for fome days before, and the mixture freqently ftirred. 



PROCESS THE FOURTH. 



Which may be praclifed alone, injlead of Proeefs the Firji, as it 

 will edulcorate and purify Fijh-oil to a considerable Degree, Jb 

 as to anfwer moft Purpofes, and for Proeefs the Third, zvheii 

 the whole is performed. 



Proeefs 4. 

 Purification by 

 Eme water. 



TAKE a gallon of crude {Uniting oil, and put to it a pint 

 of water poured off from two ounces of lime flacked in the 

 air ; let them ftand together, and ftir them up feveral times 

 for the firil twenty-four hours ; then let them ftand a day, and 

 the lime* water will fink below the oil, which rauft be carefully 

 feparated from them. Take this oil, if not fuffieiently puri- 

 fied for your purpofe, and treat it as directed in Proeefs the 

 Third, diminifhing the quantity of pearl-afhes to one ounce, 

 and omitting the lime and chalk. 



ROBERT DOSSIE. * 



feCula not 

 precipitable 

 Tty water. 



Ill 



An Effay on the Fecula of Green Plants. By Profejbr Proust, 



(Concluded from Page 278.Vol. IV.; 



1 BELIEVE Parmentier was the firft who doubted, and it 

 was hot unreafonable in his time, whether the tincture of fe- 

 cula in alcohol was refinous, becaufe it was not precipitated 

 by water. But when we confider that water can never de- 

 tach it from the gluten, that alcohol, oils and greafe have ex- 

 clufively that property, and laftly, that this fubftance, when 

 feparated from the alcohol and left to itfelf, is a fat body, te* 



* The dregs, remaining after the fundry procefles above men- 

 tioned, will form an excellent manure ; as has been fince noticed in 

 Dr. Hunter's Georgical EfTay*. 



nacious 



