[ 317 ] 
Feet. 
Height of the Funnel - - - 
Length of the Pipe - - 
Height of the Tub - - - - 
Diameter of the Tub - - - 
Height of the Stone in the Tub 
5 
14, 15, or 16 
6 
2 
Inches* 
Diameter of the Throat of the Funnel - - 3 
Diameter of the Bore of the Pipe - - 5 
Diameter of the Blaft-Hole at N - - - 1 
Hole at I about 5 Inches fquare, 
Diameter of the Air-Holes - - - 1 i. 
a 
This Engine is likewife of admirable Ufe to con- 
vey frefii Air into the Works; which faves the dou- 
ble Drifts and Shafts, and cutting Communications 
between them. 
A fmall one will do very well for a Blacky 
imith. 
XX 
w|«l p]m »»J«i 
