. The railroad and engineering journal . ic reflectors consequent on atmospheric influence,which, after a few hours of exposure, renders their surfacestarnished and ineffective unless continually polished. Aglance at the accompanying illustration (fig. i) shows thatthe reflector constructed for my sun motor differs altogetherfrom thatoiiginated by Mouchot, which Tellie,-s apparatus,tested at Paris, was intended to displace. I. The mirrors which reflect the solar rays are devoid ofcurvature, being flat narrow strips of ordinary window-glass cut to uniform width and length, perfectly straight. 3
. The railroad and engineering journal . ic reflectors consequent on atmospheric influence,which, after a few hours of exposure, renders their surfacestarnished and ineffective unless continually polished. Aglance at the accompanying illustration (fig. i) shows thatthe reflector constructed for my sun motor differs altogetherfrom thatoiiginated by Mouchot, which Tellie,-s apparatus,tested at Paris, was intended to displace. I. The mirrors which reflect the solar rays are devoid ofcurvature, being flat narrow strips of ordinary window-glass cut to uniform width and length, perfectly straight. 392 THE RAILROAD AND [September, 1888. 2. The undersides of said strips are coated with silver bya process which prevents the action of the suns rays fromdestroying the silver coating, as in ordinary looliing-glasses. 3. The mirrors supported by the bent metallic ribs ex-tending from side to side of the parabolic trough are helddown by the heads of small screws tapped into the slats of wood may be introduced between the mirrors. and the ribs—an expedient of some importance in localitieswhere the reflector is exposed to high winds. 4. ft needs no explanation that the reflecting surface ofthe mirrors cannot become tarnished by atmospheric influ-ence, since the bright side of the silver coating is perma-nently protected by the glass ; hence it will be only neces-sary to remove dust from the mirrors, an operation readily
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Keywords: ., bookcentury1800, bookdecade1880, bookidrailroadengi, bookyear1887
