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Scientific American, Vol. 68, No. 24 (1893) (1893)
leaf 4
with the pavement, at either side turning of the lime in the well known oxy-hydrogen of a rail of the main apparatus. The bellows, front and objective supports, ELECTRIC TIME SYSTEM-SECONDARY DIAL. track. The switch rail, ean be readily removed, admitting of the use of the located over the pit,… … condition required by the of the best class. © 1893 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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