Gum

Definition and stakes

Arnold James Cooley,  Cooley's Cyclopædia of Practical Receipts and Collateral Information in the Arts…

“ The white is considered the best. It was formerly used in medicine.
GUM. Syn. Gummi, L. The general term for an important class of vegetable products. Gums are more or less soluble in cold water, but insoluble in alcohol, ether, and oils. They are obtained from certain plants in amorphous masses; most of them exude spontaneously, or on puncturing the bark. The most perfect type of this class is the substance called GUM ARABIC, or GUM ACACIA. The gums are employed as demulcents in medicines, and are used as cements, and for giving stiffness and gloss to textile fabrics.
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Source: Gutenberg

New York Journal of Pharmacy, Volume 1…

“ The Pharmacopœia directs the use of powdered gum and of boiling water, whereas gum, in its ordinary condition or coarsely broken, and cold water make a clearer solution. Cold water is directed for the solution of the gum by the Edinburgh process, and in our present formula for “Syrup of Gum Arabic;”—if appropriate for the latter, it is quite as much so for the forming of mucilage. When the gum has been ground in a mill it appears to have been a little charred and forms a somewhat turbid solution; if powdered by hand, and rather more coarsely, its solution is clearer. ”
Source: Gutenberg

Mrs. Marcet,  Conversations on Chemistry, V. 1-2

“ CAROLINE.
Is that the gum so frequently used instead of paste or glue?
MRS. B.
It is; almost all fruit-trees yield some sort of gum, but that most commonly used in the arts is obtained from a species of acacia-tree in Arabia, and is called gum arabic; it forms the chief nourishment of the natives of those parts, who obtain it in great quantities from incisions which they make in the trees.
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Source: Gutenberg

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