Manufacture of Paints with Fish Oil. 51 



To refine one Ton of Cod, Whale, or Seal Oil for Painting, 

 with the Cost attending it. 



One ton offish oil, or 252 gallons 

 32 gallons of vinegar, at 25. per gallon 

 12 lbs. litharge, at bd. per lb. 

 12 lbs. white copperas, at 6d. ditto - 

 12 gallons of linseed oil, at 4 5. 6d. per gallon 2 

 2 gallons of spirit of turpentine, at 85. ditto 16 



252 gallons of fish oil, 

 12 ditto linseed oil, 

 2 ditto spirits of turpentine, 

 32 ditto vinegar, 



20.8 gallons, worth 4 5. 6d. per gallon. 

 Which produces - £. 67 1 

 Deduct the expense - 43 5 O 



23 16 profit. 



To prepare the Vinegar for the Oil. 

 Into a cask which will contain about foity gallons put 

 thirty-two gallons of good common vinegar; add to this 

 twelve pounds of litharge, and twelve pounds of white cop- 

 peras in powder ; bung up the vessel, and shake and roll it 

 well twice a day for a week, when it will be fit to put into 

 a ton of whale, cod, or seal oil, (but the southern whale oil 

 Is to be preferred, on account of its good colour, and little 

 or no smell ;) shake and mix all together, when it may settle 

 until the next day; then pour off the clear, which will be 

 about seven-eighths of the whole. To this clear part add 

 twelve gallons of linseed oil, and two gallons of spirits of 

 turpentine; shake them well together; and after the whole 

 has settled two or three days it will be fit to grind white 

 lead and all fine colours in ; and, when ground, cannot be 

 distinguished from those ground in linseed oil, unless by 

 the superiority of its colour. 



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