20 Pollock’s Self-adjusting Rail-road and Street Car . DESCRIPTION OF THE DRAWINGS. Fig . 1, top view of the carriage . … A, A, the bolsters and axles. B, B, the centre bolts. C, C, the coupling rods. D, D, wheels. E, E, the gallows, or arms. F, F, pins for the slings to move on. G, the slider. H, mortise or slits in the slider. Fig. 2, side view of part of one of the front wheels , and of the prin¬ cipal adjusting…
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