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Scan 286
Old Violins And Their Makers, 1883
2 lines. Read by computer on 27 September 2026. Printed page 272. See the scan on archive.org.
1orange. A more or less concentrated solution of gum lac has been used as a sizing, but it is the hardest of any of those mentioned before, and would possess all their disadvantages. The following are the proportions for these sizings, the weights given being avoirdupois, and as a drachm avoirdupois contains only about 27 1/2 grains, and a drachm troy 60 grains, it may be as well to mention this to avoid any chance of error: Take 12 drachms of stick gamboge, which is finer than that in cakes, break it, and reduce it to powder on a sheet of paper by means of a bottle used as a roller, if you have not a mortar. It will be necessary to mix it up from time to time with a knife while bruising, in order to insure that it be thoroughly well done. Put half of this powder into three-quarters of a gill of alcohol in a small bottle, and let them unite for eight or ten days, stirring the liquid once or twice each day. At the end of this time, filter into a glass funnel through linen, which will retain the gummy portions insoluble in alcohol. Into this liquid, already coloured, put the second half of the gamboge, and treat it as before. About the end of a fortnight filter it or pass it through bibulous paper into the same funnel, previously cleansed. It is better, as indicated above, to do this twice, because the resin is then brought into closer contact with the alcohol, and a greater quantity can be dissolved, but if you are in a hurry, it can be done at once. The colour will, however, be less intense. The process may be hastened by placing the phial in a stove, which must not be so warm as to cause the alcohol to boil, as this might break the glass and incur danger from fire. To prevent the phial becoming too hot, a few leaves of
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