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To the Editor:
—The difficulty of keeping rubber bulbs in long service, complained of by Dr. Goodman (The Journal, Jan. 14, 1911, p. 113), has led me to devise a contrivance which does away with the rubber bulb altogether and is much cheaper as well as more satisfactory. The device consists of an ordinary bicycle pump connected with a piece of rubber tubing by means of a Schrader valve (used in a bicycle tire). To the end of the barrel of the pump is soldered on a flat band made of sheet tin, leaving a space through which a leather strap is passed and by means of which the pump may be secured to one's leg or other convenient support. In using the sphygmomanometer the pump is attached to the apparatus and operated in the same manner as the rubber bulb. It will be found, however, that the pump gives
Robin A. Preservation of Rubber Bulbs. JAMA. 1911;LVI(5):367. doi:10.1001/jama.1911.02560050053028
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