Compound Oils. 483 



leave the vessel till quite cold before you open it, otherwise the 

 varnish will be blown out with violence. 



Varnish for coloured draicings. Canada balsam 1 oz., oil of 

 turpentine 2 oz. : size the drawings first with a jelly of isinglass, 

 and, when dry, apply the varnish, which will make them resem- 

 hle oil paintings. 



Common turpentine varnish. Resin, flav. 3lb. 8 oz., ol. tereb. 

 1 gall. — 2. Ol. tereb., ol. spicae, sang, dracon., ana lb. j. 



Italian var?iish. Boil Scio turp. 8 oz. until it is brittle ; powder 

 very fine, and dissolve in ol. tereb. 



Mastic varnish. Gum mastic 4 oz., ol. tereb. 2 pints. 



Oil varnish for common work. Resin 3lb., turpentine 21b., 

 <lrying linseed oil 10 pints; dissolve by heating: if too thick, 

 thm by a little oil of turpentine. 



Gold size, 01. lini 161b., asphalt. 21b., brown umber lib., red 

 lead lib., turp. 8lb. — 2. Gum anime, gum asphaltum, of each 

 1 oz., litharge, red lead, brown umber, of each half an oz., linseed 

 oil 4 oz., drying oil 8 oz. ; melt together, and strain. 



Japan gold size. Gum. ammon. 4 oz., linseed oil 1 oz. ; dissolve 

 by boiling, and thin by adding oil of turpentine. 



Sheldrake'^s oil for paintinr/. Nut or poppy oil 1 pint ; boil, 

 add ceruss. 2 oz., when dissolved add a pint of his copal varnish, 

 previously warmed, and stir till the oil of turpentine is eva|X)rated : 

 gives more brightness than common drying oil, but less than var- 

 nish ; loses its drying quality in time, therefore only so much as 

 is sufficient for a month or six weeks'* consumption should be made 

 at once. 



Black japan for leather. Boiled linseed oil 1 gallon, burnt 

 umber 8 oz., asphaltum 3 oz., boil, and add ol. terebinth, q. s. — 

 2. 01. tereb. 2 oz., shell lac 1 oz., S. V. R. 3iiij, bone black q. s. 



Famish for f/ratrsy Brunsvnck black. Asphalt, comm. 4lb. ; 

 melt, add ol. lini 2lb., ol. terebinth. 1 gall. 



Norfolk fluid for preservinrj leather. Linseed oil 3 pints, res. 

 flav. 4 oz., fir resin 2 oz., cer. flav. 12 oz.; melt, add neat's foot 

 oil 2 pints, ol. terebinth. 1 pint : to preserve and soften leather. 



Flexible varnish, Indian rubber dissolved in a sufficient quan- 

 tity <if petroleum, naphtha, or oil of coal tar; used for varnishing 

 balloons. 



FemiJt Martin, Put Scio turpentine 4oz. into a gallon stone 



ware pot on a clear fire, when fluid add H oz. finely powdered 



ellow amber, in a quarter of an hour add copal in pieces lib., 



io turp. and warm spirit of turp.. of each 4 oz. ; in half on hour 



