. Railway and Locomotive Engineering. es will take their tow ropesas do the mules along the banks of theErie Canal through New York State, anddraw the ships into and through the locks. There will be two towing tracks for or paid out without actual motion of thelocomotive on the track. The locomotives are to run over railsset in concrete on steel ties with cast steelrack gear and with conductor slots insteel. The concrete bed is on top of awall of concrete. Concrete and steel arepractically the only component parts ofthe construction of the mighty will require 5,000,000 cu. yds. of
. Railway and Locomotive Engineering. es will take their tow ropesas do the mules along the banks of theErie Canal through New York State, anddraw the ships into and through the locks. There will be two towing tracks for or paid out without actual motion of thelocomotive on the track. The locomotives are to run over railsset in concrete on steel ties with cast steelrack gear and with conductor slots insteel. The concrete bed is on top of awall of concrete. Concrete and steel arepractically the only component parts ofthe construction of the mighty will require 5,000,000 cu. yds. of con-crete for the completed beds and as to the steel the pictured steelgates give as clear an idea of the usemade of concretes twin as any printedfigures. Each one of these gates consists of twohalves or leaves. Each leaf weighs in theneighborhood of 812 tons. There areninety-two of these leaves weighing inaggregate over 56,000 tons—more thanenough steel to construct twenty milesof the finest of roads for the Pennsylvania. VIEW OF PEDRO MIGUEL LOCK. each fliglit of locks, one on one side andone on the middle wall. On each sidethere will be one return track and onthe middle wall a third, common to bothof the twin locks. These tracks areshown for the first time in this tracks are to run continuously theentire length of the flights and will ex-tend out beyond the locks on the guideapproach walls at each end. The numberof the locomotives to be used will vary,of course, with the size of the vesseltowed. The usual number required willbe four; two ahead, one on each wall,towing the vessel, and two astern, one oneach wall, to keep the ship in the centerof the stream and to bring it to a stand-still when it is well within the lock cham-ber. These locomotives are to be thestrongest and most capable of hard workof any that have ever been will be equipped with slip drums,towing windlasses and hawsers whichwill permit the towing line to be
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