Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 97
affords room for two small cars 4 feet long each and consequently theweight coming on the centre of the rail and which has to be supportedby the truss is the weight of one car loaded. If the top wires, bymeans of an iron rod and nuts, have been braced in advance with thebottom wires, to a rigidity…
Science · Technology · Meteorology · Patents
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
