. Railway and Locomotive Engineering. nians. As an engineering feattht work surpassed anything hitherto at-tempted. The curves and grades amongthe mountains around Mauch Chunkwere, in point of sharpness and steepness,scmething resembling the scenic minia-ture railways in operation at popularwatering places. For this road the firmot Garrett and Eastwick of Philadelpliia,obtained an order to build a was named Samuel D. Ingham. Itwas reallv the first of wliat afterwards, cab was not roofed, but it was the begin-ning of a very desirable improvement inthe direction of the finished cab
. Railway and Locomotive Engineering. nians. As an engineering feattht work surpassed anything hitherto at-tempted. The curves and grades amongthe mountains around Mauch Chunkwere, in point of sharpness and steepness,scmething resembling the scenic minia-ture railways in operation at popularwatering places. For this road the firmot Garrett and Eastwick of Philadelpliia,obtained an order to build a was named Samuel D. Ingham. Itwas reallv the first of wliat afterwards, cab was not roofed, but it was the begin-ning of a very desirable improvement inthe direction of the finished cab. Therails were of the strap kind 2J/2 ins. by54 in. laid on pine stringers. The valvegear was the invention of Mr. AndrewM. Eastwick, and was entirely original.,\ sliding l)lock was placed between theslide valve and the valve seat, which by(jjcning or closing the ports leading tothe cylinder, acted as a reversing followed uppeared the first equalizers, andtlie first coimterbalanced wheels. It need. BLACK DI.\MOND EXPRESS OK THE LEHIGH V.\LLEY R.\ILRO.\D. nings and mark the splendid expansion ofthis magnificent highway that, started asa small coal-carrying road among themountains of Eastern Pennsylvania, feeblystruggling to bring a few coal cars to thenearest canal, until now when it links theAtlantic seaboard to the great lakes witha shining pathway of steel, over which thegorgeously equipped trains pass withwinged speed, and with a degree of ele-gance and comfort to the traveling publicthat is not surpassed in the experienceof thousands of people accustomed torailroad journeys. with some modifications, became \merican type of locomotive, and formore than half a century the most popu-lar type of locomotive in the world. Itwas furnished with inside frames andoutside cylinders. With a four-wheeledswivel truck and one pair of drivingwheels on front of the firebox and an-other pair in rear of the firebox, it hadthe elements of flexibility a
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