This section is from the book "Facts Worth Knowing", by Robert Kemp Philip. Also available from Amazon: Inquire Within for Anything You Want to Know.
Melt four pounds of common asphaltum, and add two pints of linseed oil and one gallon of oil of turpentine. This is usually put up in stoneware bottles for sale, and is used with a paint brush. If too thick, more turpentine may be added.
 
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