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Milton, Ky., April 15, 1895.
To the Editor:
—The details of the plan which I suggested in the Journal of March 30, for supplying pure air to cities are as follows: Upon a sufficient foundation is a frame thirty feet high, within which is an elevator running to top of frame, for the purpose of raising the perpendicular sections of steel plate pipes, each of which is twenty feet long, and each one is larger than the one above it, to which it is securely bolted, and also of heavier plate. When the first two joints are securely joined at the top of frame they are elevated until another is added and so on until the first attains the desired height. Guys are attached and are so arranged as to maintain the pipe perpendicularly.Electric lights could be attached to the top of the pipe, and being at an elevation
Hampton SE. Mountain Air for Cities. JAMA. 1895;XXIV(16):603–604. doi:10.1001/jama.1895.02430160031012
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