. By means of this threaded part of the screw is then engaged in the of the grade, it had to cross over to the other track to device, the marksman simply by referring to the an- screw threads of the plate, k, and the circuit is com- let an important passenger train pass it, necessitating a… … SIDE VIEW OF THE DUMMY TARGET. In making this back and forward movement the train has been without walking several hundred yards to broke in two eight or nine different times, on one occa- the target. sion shearing the twelve 1-inch drawbar pocket bolts— The target itself consists of two sets of…
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