3G ANNUAL OF SCIENTIFIC DISCOVERT, 



sions to allow of its being turned on iin ordinary 40-fcct turn- 

 table. Hence, instead of seating, as is intended, the 100 passen- 

 gers in the standard carriage, the carriage under trial only gave 

 seating space lor IG first-class and 50 second-class, in all 66 pas- 

 sengers. The accommodation per i)assenger is as good as is given 

 on the best lines, and infinitely superior to the stock usually 

 worked on branch lines. The length of the carriage is 43 feet, 

 including a comi)artment near the engine for the guard. The 

 engine, carriage, and framini> all conipkte, in working order, but 

 exclusive of passengers, weighs under ID-i tons, and including its full 

 load of passengers, 18i tons only: Tiie carriage when finished 

 complete will have a broad step or platform on each side, extend- 

 ing iis entire length; this step is protected by a hand-rail on the 

 outsiile, with an arrangement for lifting it on the platform side at 

 the doors to allow the passengers to get in and out. The object 

 of this platform is to enable the guard to pass completely round 

 the train at all times, and while doing so he is perfectly safe 

 liom any accident. Passengers can also pass along the platform 

 to the guard, so that in this manner there is an easy and perfect 

 mode of communication between passengers and guard. It is in- 

 tended, however, in the stan(hird steam-carriage to provide a 

 central passage inside, the entire length of the carriage, leading 

 direct from and to the guard's compartment; thus there is the 

 most direct means of communication between the passengers and 

 guard. The compartments in the carriages will be quite as sep- 

 arate and distinct as they are at present, or as the most fastidious 

 could desire. The guard passes througli the carriage at pleasure. • 

 Those in tlu^ higher classes can pass to the lower, but the lower 

 cannot get to the higher, while all can pass to the guard when re- 

 quinnl. The standard carriage will have two compartments first- 

 class, to seat 16 i)ersons ; 3 compartments second-class, to seat 

 30 persons ; and 4^ com])artments, third-class, to seat 54 persons 

 — in all, 100 passengers. The machine complete, in working 

 order, will weigh about 14 tons, and, with 100 passengers, from 

 20 tons to 21 tons. These carriages will convey their full com- 

 plement of passengers at 40 miles per hour up gradients of one 

 in 100, and, as demonstrated, will pass round curves of 50 

 feet radius at 20 miles an hour with perfect safety. — Mechanics^ 

 Magazine. 



m 



LIGHT ROLLING STOCK. 



It has now been indisputably established that it is possible to 

 construct a combined engine and carriage capable of accommo- 

 dating 66 passengers, of both classes, the whole weight of which, 

 fully loaded, shall not exceed, if it do not fall short of, 20 tons, 

 while the adhesion weight is nearly half as much, or 10 tons, and 

 the average steam tractive force at least half a ton. The resist- 

 ance of such a carriage at 20 miles an hour, ui)on a level, would 

 not exceed DO') or. 400 pounds, nor upon a gradiiMit of one in 60 

 more than from 1,050 pounds to 1,150 pounds, the whole actual 

 work done being, saj' 25 horse-power in the one case, and 75 in : 



