New York [etc.] Simmons-Boardman Pub. Co. [etc.] · leaf 267
4 lbs., while thecommon shoe weighs about 21 lbs. It is stated that theleather shoe wiU wear about throe times as long a.s thecommon fo.rm of shoe, and that the co-efflcieut of frictionis much greater, insomuch so as to require onlv 40 lbs. .iipressure to produce th - -. - the ordinary iron shoe.… … HORIZONTAL BORING AND DRILLING MACHINE. THE HUBBAED AlfTI-FRICTIOH SIDE BEAEINO. Wl- presL-nt to our ivadurs cuts and description ofthe Hubbard anti-friction side bearings, a devicewliicli has attained popularity in service. Thesebearings are of especial interest at this time, whenthere is an…
Railroads · Railroad cars
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