XIII. MODELS, ETC. 559 



2310. Model of Skew Bevels. 



2311. Two Axes, connected by a cord and grooved pulleys. 



2312. Chain and Pulley. 



2313. Pantograph, for drawing similar curves. 



2314. Model of Watt's FaraUel Motion. 



2315. Model to illustrate the principle of Watt's 

 Parallel Motion. 



2316. Outline Model of Beam Engine, with Watt's parallel 

 motion. 



2317. Model of Roberts' Parallel Motion. 



2318. Model of Peaucellier's Straight-line Motion. 



2319. Sectional Model of a Trunk Engine. 



2320. Model showing Expansion Valve. 



2321. Model of Watt's Pendulum Governor. 



2322. Model of the Cataract as applied to single-acting 

 engines. 



2323. Model of Silver's Marine Governor 



2324. Cornish Crown Valve. 



2325. Hawthorn's Safety Valve. 



2326. Richard's Indicator. 



2327. Diagram Model for setting the Slide Valve of a 

 Horizontal Engine. 



2328. Mode of reversing Marine Engine by a single 

 eccentric. 



2329. Model of Stephenson's Link Motion. 



2330. Model of Steam Pump with Valve inside the 

 Piston. 



2331. Sectional diagram Model of the Pump. 



2332. Giffard's Injector. 



2333. Model of Slide Valve and Ports. 



