XIII. MODELS, ETC. 557 



2264. Apparatus to show that Friction is independent 

 of Velocity. 



2265. Apparatus to illustrate Friction Grips, and for 



experiments on the laws of friction. 



2266. Model to show when a Drawer jams. 



2267. Model to explain West on' s Friction Clutch. 



2268. Silent-feed Motion (Worssam). 



2269. Apparatus for illustrating the Angle of Repose 

 between Two Surfaces. 



2270. Flummer Block, showing Cylindrical Bearing. 



2271. Form of Conical Bearing. 



2272. Model of Friction Wheels. 



2273. Model of Single Pulley Block. 



2274. Two Models of Unbalanced Wheels. 



2275. Model of an Arch. 



2276. Model of Jointed Sword (Cowper). 



2277. Model of Continuous Action Pump. 



2278. Model of Pendulum, arranged for beating Time. 



2279. Model for Tracing the Curves in the Slit Bar 

 Motion. 



2280. Two Models of Eccentric Rosette Motion. 



2281. Various Models to show the production of Mea- 

 suring Bars for End measure. 



2282. Model to illustrate the conversion of Linear into 

 End measure. 



2283. Model to show Principle of Roberval's Balance. 



2284. Balance on Robervalfs Construction. 



2285. Weighing Machine. 



2286. Frame for experimenting with Epicyclic Trains, 



and with other trains, as in a screw-cutting lathe. 



