This section is from the "Henley's Twentieth Century Formulas Recipes Processes" encyclopedia, by Norman W. Henley and others.
Vanilla beans, chopped fine . . 5 parts
Tonka beans, powdered..... 10 parts
Sugar, powdered. 14 parts
Alcohol, 95 per cent.......... 25 parts
Water, quantity sufficient to make 100 parts. Rub the sugar and vanilla to a fine powder, add the tonka beans, and incorporate. Pack into a filter, and pour on 10 parts of alcohol, cut with 15 parts of water; close the faucet, and let macerate overnight. In the morning percolate with the remaining alcohol, added to 80 parts of water, until 100 parts of percolate pass through.
Vanilla beans..... 4 ounces
Tonka beans..... 8 ounces
Deodorized alcohol 8 pints
Simple syrup..... 2 pints
Cut and bruise the vanilla beans, afterwards bruising the tonka beans. Macerate for 14 days in one-half of the spirit, with occasional agitation. Pour off the clear liquor and set aside; pour the remaining spirits in the magma, and heat by means of the water bath to about 170° P. in a loosely covered vessel. Keep at this temperature 2 or 3 hours, and strain through flannel, with slight pressure. Mix the two portions of liquid, and filter through felt. Add the syrup.
 
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