i U9 } 
Thereafon of this is given by Dr. Wallisg and other 
Writers ot Mechanicks: vi^, becaufe in the firft cafe 
there was almoft the iame direction of the motion pf 
the Modell and of the ftring that drew it j but not iti 
the 2dpafe when the fore axi^ w^s? io much lower then 
itetpf pi^ Pulley. 
- i Mech. c. 7. pn 3^. 
D I 
Jin Extra^ 
