. Electric railway journal . ash frames. The latter, however, seem recently tohave lost somewhat in popularity, and one reasonthat has been put forward for this lack of generalacceptance of a feature of such obvious advantageis that the expansion and contraction of metal is somuch greater than that of wood under extremes oftemperature that it becomes a difficult matter tokeep the sash tight, although means designed toovercome this have been provided in one design bythe use of a filling of compressible composition in thegroove that holds the edges of the glass. Such sashis formed into the neces
. Electric railway journal . ash frames. The latter, however, seem recently tohave lost somewhat in popularity, and one reasonthat has been put forward for this lack of generalacceptance of a feature of such obvious advantageis that the expansion and contraction of metal is somuch greater than that of wood under extremes oftemperature that it becomes a difficult matter tokeep the sash tight, although means designed toovercome this have been provided in one design bythe use of a filling of compressible composition in thegroove that holds the edges of the glass. Such sashis formed into the necessary shapes from seamlessbrass tubing, and the bottom sash rail is furnishedwith a rubber strip which prevents shock in casethe sash is lowered violently and protects pas-sengers hands in case they should be caught underthe window, acting at the same time as a bottomweather strip. For city service the two-section window with ahigh bottom section is still the rule, although thevery recent Bay State car has three-section Interurban Seat with Cushion Removed to ShowReversing Mechanism For semi-convertible cars popularity appears tohave been accorded equally to the two arrangementswhich permit the sash either to be removed com-pletely from the car or else to be raised on curvedguides into a space between the roof and the head-lining. The former arrangement, of course, re- quires only that the sash guides on posts shall bereadily removable, so that the appellation of semi-convertible to cars so equipped is rather finelydrawn; but the fact that only a small percentage ofrecent cars have provision for removing the sashperhaps permits this classification. Sash locks for holding windows in open position
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