PROFESSOR OF CHEMISTRY IN THE ROYAL VETERINARY COLLEGE; FORMERLY LECTURER ON CHEMISTRY AT THE CHARING CROSS HOSPITAL. =Ink, Lithograph′ic.= _Prep._ 1. Mastic (in tears), 8 oz.; shell-lac, 12 oz.; Venice turpentine, 1 oz.; melt together, add, of wax, 1 lb.; tallow, 6 oz.; when dissolved, further add of hard tallow soap (in shavings), 6 oz.; and when the whole is perfectly combined add of lampblack, 4 oz.; lastly, mix well, cool a little, and then pour it into moulds, or upon a slab, and when cold cut it into square pieces.…
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