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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1895 edition. Excerpt:...side of the shoe, as shown in section Fig. 1653, lapping over the outside of the wheel and holding the shoe in place. Steel slugs are inserted in the shoe each side of the center. This shoe has the Ross feature when it is used, namely, the hollowed center. The Fig. 1659 is not strictly a Meehan-Shepard brake-shoe, for it has not the hps on either side to lap over the edge of the wheel. Melon-shaped lamp-globe. Fig. 3431. See Jai nip-globe. Meneeley roller-bearings. Figs. 5680-1. A roller-bearing which consists of a cast-iron housing, lined with plate steel, inside of which and surrounding the journal are three sets of weldless steel-tubes or cylindrical rollers. The rollers of each set are of equal length, and are placed in a ring about the journal, forming three independent rings or groups of roller-bearings. The middle set is then revolved until the axis of each roller is' midway between the axes of the inner and outer sets of rollers, the axes of the latter being in n straight line. Coldrolled steel rods, called separators, are then passed through the hollow rollers, coupling the middle ring of rollers to the outside rings each to each, which insures their keeping in line and working together. See figures 5680-1. A malleable-iron cap or lid with a brass-bearing abuts against the end of the axle to take up the end thrust. They are in use on electric-motor cars and increasing in favor. A train has been equipped with them on the Delaware & Hudson Canal Company and favorable results obtained. One car has been in service for some time on the Boston & Albany Railroad. See Rollerbearings. Mercurial check-valve. (Frost system of gas lighting.) Figs. 8119-3120. The bowl, 1, of this valve is filled with mercury up to the height of the set-screw,...