136 ELECTRO-PNEUMATIC SWITCHING AND SIGNALING SYSTEM AT THE SOUTH BOSTON TERMINAL STATION. MARCH 3 1900. BOSTON TERMINAL YARD SHOWING DIAMOND CROSSINGS AND SWITCHES AND ONE OF THE SIGNAL BRIDGES REAR VIEW SHOWING_ROTATING SHAFTS ELECTRO-MAGNETS AND INTERLOCKING BARS. SFRONT VIEW OF ELECTRIC INTERLOCKING MACHINE MOWING OPERATING LEVERS AND WORKING MODEL OF YARD., scientific american, 1900-03-03
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136 ELECTRO-PNEUMATIC SWITCHING, SIGNALING SYSTEM, SOUTH BOSTON TERMINAL STATION, MARCH 3 1900, BOSTON TERMINAL YARD SHOWING DIAMOND CROSSINGS, SWITCHES, ONE, SIGNAL BRIDGES REAR VIEW SHOWING_ROTATING SHAFTS ELECTRO-MAGNETS, INTERLOCKING BARS, SFRONT VIEW, ELECTRIC INTERLOCKING MACHINE MOWING OPERATING LEVERS, WORKING MODEL, YARD, scientific american, 1900-03-03, science, scientific, sciences, mind, health, tech, sustainability, publication, lab, sciam, sa, scientist, research, american, experiment, education, discovery, technology, analysis, magazine, u.s., insights, developments, weekly, broadsheet, inventor, innovation, inventions, patented, industrial revolution, emerging, trends, monthly magazine, united states, engravings, curious works, paper, discover, Scientific Paper, Weekly Journal, Practical Information, Art, Science, Mechanics, Chemistry, Manufactures, research, education, scientist, innovation, 19th century, vintage, america, Rufus M. Porter, 1845, journal, academic, newspaper illustrations, retro style, old-fashioned, media illustrations, victorian style, news, newspaperheadline, 19th century style, illustration, journalism
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