. Railway master mechanic [microform] . phical form. Both publications are care-fully indexed, with all needed fullness of refer-ences, and thus the notably valuable technical in-formation contained within their covers is placed atready command of the investigator and student. The Baltimore & Ohio has made a notable recordin the way of acquiring new and thoroughly modernequipment. Within the past 60 days the receivershave ordered almost 6000 new freight cars of whichthe Pullman Company is building 1000 box and 1000drop-end gondolas; the Michigan Peninsular 3000box cars, and the South Baltimore
. Railway master mechanic [microform] . phical form. Both publications are care-fully indexed, with all needed fullness of refer-ences, and thus the notably valuable technical in-formation contained within their covers is placed atready command of the investigator and student. The Baltimore & Ohio has made a notable recordin the way of acquiring new and thoroughly modernequipment. Within the past 60 days the receivershave ordered almost 6000 new freight cars of whichthe Pullman Company is building 1000 box and 1000drop-end gondolas; the Michigan Peninsular 3000box cars, and the South Baltimore Car Works 200box cars. 500 hopper coal cars and 15 four-wheel ca-booses—making a total of freight cars or-dered in less than two years. These cars are all ofmodern construction, are fully equipped with airbrakes and automatic couplers, and average 60,000pounds capacity. It is estimated that fully 85 percent of the B. & O. freight cars have air brakes andautomatic couplers in accordance with the interstatecommerce FILE DRIVER CAR-LAKE SHORE & MICHIG AN SOUTHERN RAILWAY. October, 1898. RAILWAY MASTER MECHANIC. 141 THE DE WALLACE TRAIN ORDER SIGNAL. In the De Wallace train order signal, invented byMr. Harry De Wallace, of St. Paul, Minn., the ob-ject sought for (the attainment of which has beenfully demonstrated by experiments and trials onrailways of the Northwestl has been to provide anaccurate and reliable distance indicator and remind-er signal, for use by locomotive engineers, for thepurpose of preventing forgetfulness, and the mis-carriage of train orders and other obligations, andfurther, to automatically apply the air and stop thetrain a safe distance short of the order point, incase the engineer fails or neglects to release thesame within a given time. To solve this problem, Mr. Wallace has devisedhis purely mechanical train order signal and stop-ping attachment, which works automatically, is pos-itive in its connections and action, reliable and ef-fective
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