This section is from the book "Cassell's Cyclopaedia Of Mechanics", by Paul N. Hasluck. Also available from Amazon: Cassell's Cyclopaedia Of Mechanics.
To make a purple stain, obtain l1b. of logwood chips or 1/4 lb. of logwood extract. 1/4 lb. of pearlash, 2oz. of powdered indigo, and 3 qt. of water. Boil the logwood till the full strength is obtained, then add pearlash and indigo. The stain may be used hot or cold.
 
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