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Scientific American, Vol. 69, No. 19 (November 1893) (1893)
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on or disease germs. The mattresses and pillows are cov- the cut-off rods are shifted by the trip mechanism one ered with a light covering of fine curled hair or other of the stops will engage with a crab to prevent the material, which may be removed for cleaning when pick from touching the valve… … the mysterious wnvs in which serious fires sometimes ments were first laid THE WORLD'S COLUMBIAN EXPOSITION-EXHIBIT OF THE WESTON * WELLS in Paris in 1854. St0T* MANUFACTURING COMPANY, OF PHILADELPHIA PA. © 1893 SCIENTIFIC AMERICAN, INC.Exhibit · Apparatus · Valve · Munn · Adapted · Scientific American · Cross piece · Columbian exposition · Horse power · Live steam · Street railway · Electric railway · Live stock · Sewing machine · Brush electric
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