. The street railway review . and 3 in. in front of the hub; pass awire round the journal to hold the bundle of wires in place aroundthe whcelfit, and another wire around the other end of the wires;then press the wheels on in the usual way and you can rest as-sured that you have one wheel that will never get loose again. Thesmall hard wires imbed themselves, half in the softer steel of theaxle, and half in the cast iron of the hub and act as so many keysto hold them from turning. The writer would like to see the beveled tread abandoned andthe tread made slightly concave; this would render trac
. The street railway review . and 3 in. in front of the hub; pass awire round the journal to hold the bundle of wires in place aroundthe whcelfit, and another wire around the other end of the wires;then press the wheels on in the usual way and you can rest as-sured that you have one wheel that will never get loose again. Thesmall hard wires imbed themselves, half in the softer steel of theaxle, and half in the cast iron of the hub and act as so many keysto hold them from turning. The writer would like to see the beveled tread abandoned andthe tread made slightly concave; this would render track repairsmaterially less and give better wheel life results. HEATING AND VENTILATING CAR PAINTSHOPS. The efficient heating and ventilating of a car paint shop greatlyincreases the capacity by reason of the more rapid drying of thepaint and is therefore one of the important things to be consideredin designing such a building. The blower system whereby heatedair is forced throughout a building by means of a fan is well adapted. l>.\ PAINT SHOP. for buildings of this class, though the usuoi method 01 distributingthe air horizontally from overhead outlets is not practicable. Theillustration shows the blower system of ventilation and heating asapplied in the passenger car paint shop of the Pittsburg. Columbus,Cincinnati & St. Louis Ry. at Columbus, O. Here »he apparatusis located in one corner of the building, and the air is distributedthrough an overhead system of galvanized iron piping, extendingentirely around the inside of the building at some distance from thewalls. Between each pair cf tracks pipes are brought down, so as 866 STREET RAILWAY REVIEW. [ IX, No. 12 to deliver the air very near the floor, where it naturally spreads, andwhence it gradually rises in a well-distributed nia?s. This plant was installed by the B. F. Sturtevant Co., of Boston,Mass., and is the arrangement recommended as best (or buildings ofthis class. In the Review for July last, page 48
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