PhPb. Trans. MDCCCIXXI Plate XVI 
^ <r 
to' V 
3 
HO 
r-> 
rS 
3 ^ 
w 
FIG. IV 
W.H. Wesley sc. 
Scale, vised in cUccq^Yll. 
For areas of curves LLL ,3 square uul'ics — 4000 tons. 
For ordinates of curves VW, t inch = 400 tons. 
For ordinates of curves MMM, 1 inch = 16000 foot tons. 
Forlenqths alana line. A B ( 3 inches — ZOOfeeto. 
W West Or C° in VV 
