o that formed on the inner surface of one of the side flanges Ne when struck by the engine wheels they of the standard. A flanged plate having a short rack BAIR’S RAILROAD GATE. will be pushed forward and downward, formed on the lower part of the inner surface of one of turning the shafts and… … the opening. Then the air is drawn from the bulbs. “The open end of the big tube is attached to an air pump, which has forty pounds of mercury at its top. lever engages with this rack. A part of this pinion is As the mercury drops it carries all the air with it, and so made that it can engage with…
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