United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 641
vaporor gas produced from an alcoholic solution of balsam fir, balsam tolu and hemlock- 75spruce oil. 12. The art or process of improving thetone or timbre of a musical instrument,Avhich consists in supplying to the interiorthereof a quantity of volatile material and 80assisting the evaporation… … tt^ r^.^.,^.
Phonograph · Patents
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