This section is from the book "Monograph on Flavoring Extracts With Essences, Syrups, and Colorings", by Joseph Harrop . Also available from Amazon: Monograph On Flavoring Extracts With Essences, Syrups And Colorings.
(Solution of Ginger. Soluble Essence (?) of Ginger)
Fluid Extract of Ginger (U. S.) .. | 4 fl. ounces. |
Pumice* (in moderately fine powder) ................... | 1 troyounce. |
Water (enough to make)........ | 12 fl. ounces. |
Pour the Fluid Extract of Ginger into a bottle, add to it the Pumice, and shake the mixture thoroughly and repeat in the course of several hours; then add the Water in proportions of about two (2) fluidounces, shaking well and frequently after each addition; when all is added, repeat the agitation occasionally during twenty-four hours; then filter, returning the first portion of the filtrate until it runs through clear; and, if necessary, pass enough Water through the filter to make twelve (12) fluidounces.
(Solution of Ginger. Soluble Essence (?) of Ginger)
Jamaica Ginger (ground).......... | 2 pounds. |
Pumice Stone (powdered)......... | 2 ounces. |
*We would suggest that the Powdered Pumice be repeatedly and carefully washed before being used in the above operation.
Lime (slaked).................... | 2 ounces. |
Dilute Alcohol (sufficient to make), | 4 pints. |
Rub the Ginger with the Pumice Stone and Lime thoroughly mixed; then moisten with Dilute Alcohol until perfectly saturated; place the mixture in a narrow percolator, being careful not to use any force in packing; simply place it to obtain the position of a powder required to be percolated, so that the menstruum will go through uniformly; lastly add Dilute Alcohol and proceed until four (4) pints of the percolate are obtained; allow the liquid to stand for twenty-four hours and filter, if necessary.
Jamaica Ginger is to be preferred in making this extract, as it not only has a finer flavor than the commoner kinds but is freer from resin.
 
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