. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . of200 lbs. steam in even small amounts soon becomes a nuisance. Class O on the Pennsylvania : I have scon quite a hit 01 comment ^fir HtWy^BL iBBpf 5^ ■•^^,, ;..; ^^ ..- .. ,. - • • •■=^1 VALLtV \K WIIH WHISILK UIKELT UulLtk. .Much iiiciiivcnicnce is experienced attime*. i|v cold weather kli%rv of locomotive material. lately in Knilway and Locomotive En-gineering, about the Pennsylvania classP and class K locomotives. I have 366 RAILWAY A


. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . of200 lbs. steam in even small amounts soon becomes a nuisance. Class O on the Pennsylvania : I have scon quite a hit 01 comment ^fir HtWy^BL iBBpf 5^ ■•^^,, ;..; ^^ ..- .. ,. - • • •■=^1 VALLtV \K WIIH WHISILK UIKELT UulLtk. .Much iiiciiivcnicnce is experienced attime*. i|v cold weather kli%rv of locomotive material. lately in Knilway and Locomotive En-gineering, about the Pennsylvania classP and class K locomotives. I have 366 RAILWAY AND LOCOMOTIVE ENGINEERING. September, igio. been greatly interested in tiie illustra-tions and discussions about them, andhope to see more about these enginesin your paper, especially the older ones,as they have peculiarities about themwhich distinguish them from the en-gines of other roads. I have seen butlittle mention, so far, about the oldclass O engines. The locomotives ofthis class first came out in i88.!, thesame year that the Ps appeared, butdiffered from the class P engines in. IH;. I. V. k. K. ENGINE NO. gji6. having but 130 lbs. boiler pressure,while the Ps carried 140 lbs. I amsending you a photograph, Fig. i, of aclass O engine. No. 9316, built at Al-toona shops in 1887. It has 18 x and 62-in. driving wheels. Theboiler is of the wagon-top pattern. Thetype of stack and headlight and thegraceful outlines of the anddome all give the engine a distinctlyPennsy look, and older Pennsylvaniamen could easily recognize her. The engine belongs on the Clevelandand Marietta division of the Pennsyl-vania Lines, and has just been turnedout of the Fort Wayne shops, after ageneral overhauling. Later O en-gines were built having Belpaire boil-


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