( »«4 ) 
VHL An Account of a Book entituFd Vegetable 
Staticks : Or an Account of fume Statical Ex- 
periments on the Sap in Vegetables ,• being an 
Effay towards a natural Hiftory of Vege- 
tation* Alfa, a Specimen of an Attempt 
to Analyfe the Air ^ by a great Variety of 
Chymico-Statical Experiments; which were 
read at feveral Meetings before the Royal 
Society, i^c. By Stephen Hales, B.D.F,R,S^ 
ReSior of Farringdon,Hampfhire, and Minifler 
of Teddington, Middlefex. The Account by 
the Rev, John Theoph, Defaguliers, L L, D. 
R, S. S. 
A S the Aatients usM to fay, that Geometry and 
Arithmetick are the Wings of a Mathematician ; 
fo a Mechanical Hand, and a Mathematical Head are 
the neceffary Qualifications of an Experimental Phi- 
lofopher. The firft alone may enable a Man to make 
a great many Experiments, but not to judge of them : 
For v/ithout being able to obferve, compare, and calcu- 
late the exadt Quantity of Weight, Force, Velocity,Mo- 
tion, or any other Change to be taken notice of in mak- 
ing Experiments; Efieds may be attributed to Caufes 
which are not adequate to them, and fometimes ex- 
peded to be produc’d even without a Caufe ; as appears ' 
by the Cod and Trouble of thafe who have attempted to. 
find 
