412 SEC. 12. API'LIED MECHANICS. 



Section tli rough 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. 



Note. 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 \ 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. 



A longitudinal through section, and a section when turned \ of 

 a revolution. 



South Kensington Museum. 



2119. Working Drawing, on a 1 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. 



Pendulum rod, showing ball in section, and method of attach- 

 ment. 



Elevation and plan of forked rod. 



Section through slide. 



The front and side elevations are on \ scale, or 3 inches to 

 1 foot. 



The details are on J scale, or 6 inches to 1 foot. 



South Kensington Museum. 



2121. Working Drawing, on a J scale, or 6 inches to 1 foot. 

 Pillar block, plummer block, or pedestal ; for a 4^-inch shaft or 



journal. 



Side elevation. 



End elevation. Plan. Sheet No. 1. 



South Kensington Museum. 



