XI. MODELS, ETC. 471 



2346. Lazy Tongs. 



2347. Model for generating a Cycloid. 



2348. Model of Headstock of a Lathe. 



2349. Model of Collier's Planing Machine. 

 350. Model of a Drilling Machine. 



2351. Two Models illustrating Whitworth's Drilling 

 Machine* 



2352. Model of Eccentric Chuck. 



2353. Model to illustrate Houldsworth's Differential 

 Motion. 



2354. Model of Screw Propeller. 



2355. Model of a pair of Locomotive Wheels. 



2356. Model of Hindley's Screw. 



2357. Rolling contact between Ellipses. 



2358. Elliptical Wheels, for obtaining a quick return 

 in shaping machine. 



2359. Variable motion from Wheels set eccentrically. 



2360. Model of Koemer's Wheels. 



2361. Method of altering or stopping the reciprocation 



of an Arm without stopping the prime mover. 



2362. Model for comparing Bourdon's Gauge with 

 Mercurial Pressure Gauge. 



2363. Model to show principle of Bourdon's Gauge. 



2364. Model of Wave Line Cam. 



2365. Model of Heart Cam. 



2366. Cam with Pulleys and Band. 



2367. Model to illustrate Slit Bar Motion. 



2368. Model of Spur Wheels. 



2369. Model of Ferrault's Wheel and Axle. 

 23 7O. Model of Blowing Fan. 



2371. Model of Centrifugal Pump. 



2372. Model of Screw. 



2373. Model of Pump with revolving Belt. 



