462 SEC. 12. APPLIED MECHANICS. 



Fig. 5. General plan of apparatus. 



Fig. 6. Front and side elevation of wood-chopping machine. 



Fig. 7. On a scale of inch to 1 foot. The soda ash (used to dissolve 

 the wood into pulp) recovery apparatus. A longitudinal and cross 

 section of the apparatus. * 



Fig. 8. On a full size scale. The Sinclair's patent conical plug joint 

 for high-pressure steam boiler tubes. 



Fig. 9. On a full size scale. The section of a hollow conical boiler 

 tube joint. Sinclair's system. 



2114. Working Drawing, on a 1 scale, or 4 inches to 1 foot. 

 Sheave or pulley. For a hoisting crane. 



Side and end elevations. 



Two through sections. South Kensington Museum. 



2115. Working Drawing, on a J size scale, or 6 inches to 1 

 foot. 



Spur wheel. Tooth wheel for gearing. 



Side elevation, showing method of laying out pitch of tooth and 

 tooth circle. 



Section of arm of wheel. 



Section through centre of wheel. 



Plan of wheel. South Kensington Museum. 



2116. Working Drawing, on a ^ scale, or 4 inches to 1 foot. 

 Mitre wheel, gear wheel. Showing plan, elevation, and sections 



of wheel. South Kensington Museum. 



2117. Working Drawing, on T \, scale, or 1 inch to 1 foot. 

 Eight feet cast-iron fly-wheel. 



Side elevation with part of rim in section. 

 End elevation. Three through sections. 



South Kensington Museum. 



The wheel is cast in two segments, and united by wrought-iron hoops, 

 shrunk on the boss, and by dowels and cotters at the rim. 



2118. Working Drawing, on a J scale, or 3 inches to 1 foot. 

 Cast-iron engine crank. 



Side elevation. Plan throughout. 

 Plan when turned J of a revolution. 

 Section through firm and web. 



Longitudinal section, and a section when turned \ of a revo- 

 lution. South Kensington Museum. 



2119. Working Drawing, on a J scale, or 4 inches to 1 foot. 

 Connecting rod end, for a 25 horse-power steam engine. 

 Elevation. Plan. Two sections. 



South Kensington Museum. 



2120. Working Drawing, of the governor of a steam engine. 

 Front and side elevation. 



Elevation and plan of slide. . 



