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To the Editor:
—Some years ago, English surgeons in India found that if rubber goods were kept in a closed receptacle containing a small quantity of oil they were kept soft and pliable. A suitable receptacle can be made by taking a tin bread box with a close fitting lid. A tinsmith can fit into it one or two perforated trays, the lower one sufficiently high to prevent oil from touching it. In India a 5 gallon oil tin answers for the bread box. In the bottom of the box a few spoonfuls of kerosene oil, just enough to cover the bottom, are placed, and then the trays for the rubber are put in. The box should be marked, "Do not shake." I have used the oil method, and know that rubber apparatus so cared for has a period of usefulness much longer than usual.
Young A. PRESERVING RUBBER GOODS. JAMA. 1917;LXIX(1):62. doi:10.1001/jama.1917.02590280064032