Review of reviews and world's work . he tanning process is a long and technicalone. As to its exact nature there is a dififer-ence of opinion, one theory claiming that thetanning stufif simply coats the fiber and pre-vents adhesion or stiffening, while the otherassumes a true chemical combination betweenthe tanning liquor and the fibers, permittinga complete removal of the latter. Rapid strides have been made recenth inthe matter of classifying leather-making as ascience rather than an art. The larger tan-ning establishments conduct extensive labora-tories at a considerable cost, where investi
Review of reviews and world's work . he tanning process is a long and technicalone. As to its exact nature there is a dififer-ence of opinion, one theory claiming that thetanning stufif simply coats the fiber and pre-vents adhesion or stiffening, while the otherassumes a true chemical combination betweenthe tanning liquor and the fibers, permittinga complete removal of the latter. Rapid strides have been made recenth inthe matter of classifying leather-making as ascience rather than an art. The larger tan-ning establishments conduct extensive labora-tories at a considerable cost, where investiga-tion and experiment are constantly going the bark lands recede in the face of ad-vancing cultivation and civilization, inge-nuity in finding new tanning agents are at present from ten to fifteenplants in the country, producing all the wayfrom one to ten cars of bark and wood ex-tract per day. Probably at least 90 per the vegetable-tanned leather of to-day hasbeen at least partially tanned by LOADING QUEBRACHO LOGS IN THE HARBOR OF BUENOS AIRES.(This tree yields tannin Himost to on(-<|iiart(r of its weiglit, iind tlii loK-* liavi been largely exportedfo Kiirope and tlie United States. Kecently immense tannin extract works liave been erected In Argentinaand Paraguay, one of which is owned by a New York 452 THE AMERICAN REI^IEW OF REyiEiVS.
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Keywords: ., bookcentury1800, bookdecade1890, bookidreviewofrevi, bookyear1890
