45, COENHILL, E.G., AND 122, REGENT STEEET, W., LONDON, 



489 



FIG. 3009*. 



MODEL STEAM ENGINES. 



2996 Dr. Wollaston's Apparatus, showing the production of motion by the 



generation and condensation of steam (fig. 2996) . 10 6 15 6 



2997 Glass Models of Hero's Rotatory Steam Engine 



(Eolipyle), mounted on stand, with Spirit Lamp 



(fig. 2997) 056 0106 



2998 Toy Models of Branca's Engine 050 076 



2999 Working Models of Hero's, De Cans', Branca's, Savory's, Papin's, Newcomen's, 



Hornblower's, and Cartwright's Steam Engines . made to order. 



3000 Working Models of Sawing, Rolling, or Grinding Mills, Cranes, Pile Driving 



Engines, Steam Hammers, Pumps, &c., &c. . . made to order. 



3001 Working Model of Watt's Low Pressure or Condensing Engine 21 



3002 Ditto, Watt's High Pressure ditto . . . 5 5 10 10 15 15 



3003 Working Model of High Pressure Oscillating Engine, 



with boiler and lamp attached (fig. 3003) 110150 1100 



3004 Ditto ditto larger and better finished, bright 



metal 2 10 



3005 Horizontal Steam Engines, as fig. 3005, with brass boiler, Oscillating Cylinder, 



steam cock, safety valve, fly wheel, on japanned stand with lamp 1 10 



3006 Ditto ditto larger, and of higher finish . .220 2 10 



3007 Horizontal Steam Engine, with fixed cylinder and slide valve, eccentric 



motion, boiler, &c., &c., on mahogany stand . .550 660 



FIG. 3010. 



3008 Locomotive Engine, Working Model, in cheap form, of 

 japanned metal 



220 2 10 



