634 



Heat and Work. 



55 268. 1 : 7. 



55 269. 1 : 7. 



55 270. 1 : 12. 



55 271. 1 : 5. 



55,268. Model of a Watt Low-pressure Engine, of metal and cardboard, movable, Figure 1. 



.V..-J6J). Sectional Model of a Watt Low-pressure Steam Engine, F i g u r e, of metal; showing 



in section the cylinder, valve-chest, condenser and pumps; cylinder bore 32 mm . . 11. 



55,270. High Pressure Iron Boiler, Figure, after Friedr. C. G. Miiller, for 6 Atmosphere* 

 (M. T., p. 165), with Fletcher gas-burner, water gauge, discharge-cock, pressure-gauge. 

 .-upports tin I In- check manometer, safety valve, steam pipe cock and feed pump . . IS. 



.V>.L'71. Model Steam Engine, Figure, with brass boiler. Bafetj \alve. water discharge- 

 cock, testing cock, steam pipe cock, water gauge, whistle, pressure-gauge and feed pump; 

 also with a complete sectional model of a steam cylinder. With gas burner .... 11. 



8. (1. 



.">.> 



0.0 



Fitted, it clcMivd. uitli spirit Inirner in place of the gas burner. 



01. 1897, 1880, 

 5836,1899. 



