. Revised and enlarged ed. of the science of railways . This piping should be securely fastened orprotected so as to prevent emph)yes, when gettinginto or climbing from the pit, from loosening thejoints and thereby rendering the appliance un-serviceable or in need of repairs. The methoddescribed of heating the roundhouse is superiorto all others, as it is important that the heatshould be concentrated directly under the prin-cipal machinery of the engine, so that whenfrozen or covered with snow and ice these partsmay be quickly thawed out, cleaned and inspectedand, if necessary, repaired.^ The
. Revised and enlarged ed. of the science of railways . This piping should be securely fastened orprotected so as to prevent emph)yes, when gettinginto or climbing from the pit, from loosening thejoints and thereby rendering the appliance un-serviceable or in need of repairs. The methoddescribed of heating the roundhouse is superiorto all others, as it is important that the heatshould be concentrated directly under the prin-cipal machinery of the engine, so that whenfrozen or covered with snow and ice these partsmay be quickly thawed out, cleaned and inspectedand, if necessary, repaired.^ The pits should be *<In cold climates low, flat roofs are very generally construction largely reduces the square feet of area whichit is necessary to heat.—Mr. G. W. Rhodes. 16 Vol. 1 242 RAILWAY EQUIPMENT. provided with adequate draining facilities andsewer connections. Especial attention should begiven to sewerage, also the provision for carryingoff the sediment and incrustation from the boilerswithout blocking the drains. Hydrants should. The dimensions will, of course, be increased ordecreased, according to the amount of work to bedone. be placed between the pits, convenientlylocated for attaching hose for washing theboilers and filling the tanks. The piping inthe roundhouse should, so far as possible, beplaced near the roof and in the center of thebuilding. The steam pipes, while carefully pro-tected, should be exposed throughout, so as tofacilitate inspection and repair. THE MA CniXER Y DEPARTMENT. 243 The floor of the roundhouse is an importaiitmatter. It should be built of material that willstand the wear and tear of heavy trucks and theblows received from falling pieces of machiner5\It should be sufficiently substantial to resistthe pressure of tlie jacks used in raising thelocomotives. Light may be provided by windows in the rearof the building and, if necessary, by insertingpanes of glass in the doors. Skylights, if neces-sary, may be used. The doors of th
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