Expert information about hide glue, its properties, instructions for using, additives to prolong its life, and research, can be found in a book: "The Orchestrion Builders Manual" by Craig Brougher, who is a member of the Mechanical Music Digest at rolls@foxtail.com. The book in an invaluable source for info, ( even on judging piano quality)! I recommend it. (and have no financial interest in it!) Mr. Berley Antoine Firmin II Bayou la Combe, Louisiana
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