688 REPORT OF NATIONAL MUSEUM, 1891. 



412. Parts and Appliances for Locomotivks and Cars — Continued. 



Couplers and buffers, draw bars, vestibule appliances. 



Brakes — Air, direct and automatic, steam, vacuum, electric. 



Reservoirs, valves and other appliances. 



Hrake beams, brake shoes. 

 Il3. Permanent Way. 



Rails and splices. 



Cross-ties, spikes and rail fastenings. 



Splice bars, track bolts, stop washers. 



Frogs and crossings. 



Switches, points, levers, switch stands. 



Models and drawings of permanent way, excavation and embankment, re- 

 taining walls, ballast, drainage systems, pipes and culverts. 



414. Signals. 



Block system and semaphores. 



Interlocking switch apparatus (lever, pneumatic an<l electric). 



Railway telegraph and train telegraph apparatus. 



Draw-bridge and tunnel signals. 



Train signals — Bell cord and gong, pneumatic and electric. 



Train Hags, lanterns, torpedoes, fusees. 



415. Mechanical Accessories to Railway Plant. 



Machine shops — Special tools for construction of rolling stock, erection of 

 locomotives and manufacture of appliances for permanent way. Portable 

 cranes and special tools for wreck cars and construction cars. 



Graders, ditchers, and steam shovels. Snow plows and centrifugal excavators. 



Wreck cars, dump cars, hand-lever cars and trucks. 



416. Stations and Engine Houses. 



Passenger and freight elevators, transfer tables, furniture, ticket racks^ 



baggage barrows. 

 Engine and car houses, turntables and round houses, water tanks, track 



tanks. 



417. Rapid Transit in Cities. 



Street railways — Permanent way. Rails, chairs, cross-ties and longitudinals. 



Switches and frogs. 

 Street railways and tramways — Horse cars and street-rolling stock. 

 Underground railways — Entrance to stations, stairways, platforms, safety 



gates, exit signals. Snow scrapers and track brooms. Grip devices, 

 , brakes. Lighting and heating arrangements. Safety gates. 

 Steam, electric and compressed-air motors. 

 Traction cable and pneumatic systems. 



418. Tickets, Ticket Punches, Fare Registers, Station and Street Annunci- 



ators, AND ALL Mechanical Appliances for Collecting Fares on Ele- 

 vated AND Street Railways. 



419. Gravity Roads and Telferage Systems. 



Inclined planes, rack railroads, vertical railroads. 



Telferage and suspended-cable lines. Machinery and appliances. 



42. Electricity and its Applications.'' Special Monographic Exhibit. 



420. History and Principles of Electric;ity. 



Instructive apparatus to illustrate the history and to demonstrate the laws 



of magnetism and electricity to the student of natural philosophy. 

 Friction machines, Leyden jars, etc. 



*For the arrangement of this class T am indebted to Mr. J. Elfreth Watkjns, of 

 the National Museum. 



