Page:The New International Encyclopædia 1st ed. v. 12.djvu/444

LOCOMOTIVE. Dl.ME.V810.S8 OF RECEST TEN-WBEEL FaSSEMOEB LOCOMOTIVES L. S. and M. S. Brooks 6 (t. 8 Ins. 16 ft. 6 ins. 27 ft. 4 ins. 133,000 lbs. 171,600 lbs. 283,600 lbs. Simple 20X2S ins. 6 ft. 6 ins. 210 IbF. 10 ft. 1 in.xatt. 5 Ins. 345 2 ins. 15 tt. Oi/i in. 2,694 sq. tt. 2,917 sq. ft. 33.6 sq. tt. 5,000 gallons 19,000 lbs. Grand Trunk Sehenectadv 6 ft. 01ns.' 15 ft. 8 ins. 26 tt. 11 ins. 125,000 lbs. 166,000 lbs. 268,000 lbs. Simple 20 X 20 Ins. 6 ft. ins. 200 lbs. 10 ft. 7 ins. X 3 ft. 4 Ins. 291 2 Ins. 15 ft. 2,270 sq. tt. 2,470 sq. tt. 33.4 sq. tt. 4.500 gallons 20,000 lbs. N. Y. Central Schenectady 5 tt. 10 Ins. 14 ft. 8 ins. 26 tt. ins. 126,000 lbs, 164.000 lbs. Builder 5 ft 3 ins Wheel-base, driving Wheel-base, total 13 ft. illM. 23 ft 7 ins Weight on drivers Weight total engine Weight, engine & tender. Compound or simple 124,000 lbs. 160,000 lbs. 272,000 lbs Simple 20 X 2s Ins. 5 tt. 6 ins. 200 lbs. 9 tt. X 3 tt. 4 ins. 360 2 Ins. 14 ft. 4 Ins. 2,686 sq. ft. 2.886 sq. ft. 30.2 sq. tt. 4,500 gallons 20,000 lbs. Simple Boiler, diameter 5 ft 8 ins Fire-box 10 tt. 1 in. X 3 It. 5 1na Tubes, diameter 2 ins Heating surface, tubes... Heating surface, total... 2,267 sq. tt. 2,422 sq. ft. 33.6 sq. ft. 5,500 gallons 16,000 lbs. Coal on tender. .. Railway. Southern Richmond 6 tt. Ins. 14 ft. 7 ins. 26 ft. 1 In. 121.250 lbs. 158,000 lbs. 245.500 lbs. .Simple 21 X 2.S ins. 5 ft. 1 in. 200 lbs. 10 ft. X 3 ft. 6 Ins. 295 2% ins. 14 tt. 5 Ins. 2,217 sq. ft. 2,410 aq. ft. 35 sq. ft. 4,500 gallons 14,000 lbs. Atch.,T. and S. F. Dickson 6 tt. 1 In. 15 ft. Ins. 25 tt. 2 lus. 125.300 lbs. 156,800 lbs. 249,200 lbs. Simple 1914 X 2S Ins. 4 ft. 11 ins. 180 lbs. 7ft. 4ins.X3tt. 9 ins. 264 2% Ins. 14 ft. 10 ins. 1,796 sq. ft. 1,960 eq. ft. 25 sq. tt. 4,650 gallons 16,000 lbs. Fitchburg Baldwin 6 ft. 6 Ins. 14 ft. 6 Ins. 26 ft. 3 ins. 111,000 lbs. 150,000 lbs. 244,000 lbs. 4-cylInder compound 15 and 25X26 Ins. 6 tt. ins. 200 lbs. 10 tt. X 3 ft. 5 ins. 328 2 Ins. 15 tt. 1 in. 2,576 sq. ft. 2,748 sq. tt. 34.5 sq. tt. 4,500 gallons Baltimore and Ohio Builder Wheel-base, driving 13 tt. 8 Ins. Weight on driver 113,000 lbs. 147,000 lbs. 229,000 lbs. Simple '^1 X '^6 ins Weight t(jtal engine Weight, engine & tender. Compound or simple Cylinders 5 ft, ins Boiler pressure 190 lbs Tubes, number 231 214 ine. 14 ft 7U in*) Tubes, length Heating surface, tubes... Heating surface, total.... 1.970 8(1. tt. 2,194 sq. tt. 34.3 sq. ft. 4,000 gallons 7 244 lbs Water in tank. Coal on tender

a.xle earrving, besides its pair of wheels, a brake- pinion. The crank-pins are made spherical so ag to aflford the necessary flexibility when rounding sharp curves. All four cylinders have the same diameter and length of stroke and are inde- pendent of one another so far as st«am-supply is concerned. When running along the ordinary track the inner cylinders have no steam-supply and do not perform any work.

In the matter of brakes there are the ordinary brake-shoes on the driving wheels and strap brakes on the rear locomotive truck axles, and air- brakes on the ears. Such an engine as that shown in Fig. 17 is calculated to haul 40 tons up a 90 per cent, grade at a speed of five miles an hour. This class of engine is extensively used ou the mountain railroads of Switzerland. It is also used on the roads running up Jlount Wash- ington and Pike's Peak in the United States. _ Bibliography. The early history of locomo- tive construction and performance is given very fully in Colburn, Locomotive Engineering (Lon- don, 1871). Interesting chapters on locomotives are found in Thurston, G-roirth of the Steom En- gine (New York, 1878; 4th ed. 1807). Meyer, Modern Locomotive Construction (New York, 1892). and Whitridge, Modern Locomotives (New York. 1S07). give a large amount of infor- mation regarding modern practice in locomotive construction. A small book of unusual value is Reagan's Locomotive Mechanism and Engineer- ing (New York. 190,'?).

LOCOMOTIVE ENGINEERS, Brotherhood OF. See Railway BROTHERiioons.

LOCOMOTIVE FIREMEN, Brotherhood OF. See Railway Brotherhoods.

LOCOMOTIVES, Electric. See Electric Railways.

LOCOMOTOR ATAXIA (Neo-Lat., from Lat. locus, place + motor, mover, and Gk. ara^la, disorder, from a-, a-, not + ra^la, taxia, order, from Tdffcruv, tassein, to arrange), or Tabes Dor- s.Lis. A disease of tlie nervous system, com- monly of the posterior root-zones of the spinal cord, characterized by incoordination of move- ments and by sensory and trophic disturbances. It is not paralysis, but loss of power to order har- moniously the muscles that move the bod}' and maintain equilibrium. It begins insidiously and grows slowly. The earlier symptoms are usually disorder of vision, a girdle sensation, with shooting pains through the limbs; increasing or perverted sensibilit.v, and disturbance in the functions of the bladder and of the rectum re- sembling neuralgia or sciatica. Later, the pa- tient feels that his walking is not firm and sure; that there is some soft substance between his feet and the ground; he walks with difliculty. and with short, hurried steps ; each leg is lifted well up, but as he moves it forward, it is thrown out from him and the heel descends with force while the sole comes awkwardly after it. He now re- quires the aid of vision to walk at all, and looks steadily at his feet or at a point a little in front of them, and he cannot make a sudden turn with- out great risk of falling. If he stands erect with his feet together or nearly so, and closes his eyes, he begins to totter, and would fall if not sup- ported. These phenomena are not primarily the result of weakness of motor power, but of de- fective muscular coordination. Diminished sen- sibility in the feet and legs is usual in this dis-