( ^<5 ) 
not much depend upon the Velocity of the Body, 
againft which the Refinance is applied. 
And thus, Sir, we may fee how all Experience con- 
fpires in confirming and fetting forth that flupendi- 
ous force of realbning, which has enabled our great 
Philofopher mod furprizingly to fearch out, and di* 
ftinguifli the Springs of Natural Operations; a Work 
infinitely more difficult to accomplifli than even the 
great Improvements he has made in pure Mathematicks, 
which were previoufly neceflary inorder to hisfucceeding 
in his Searches after the Knowledge of Nature ; for in 
this lad Purfuit he has given Proof, not only of a more 
unbounded Invention, than is required in the fubriled 
Geometrical Speculations ; but has alfo there difcpvered 
the greated Difcernment, and mod confummate Judg- 
ment 5 fince in his Philofophical Writings, he has 
never been once impofed on by an Hypothefis, nor 
by any other of the various Fallacies, which my Lord 
Bacon in his Novum Organon^ has reckon’d up as the 
Caufes, that had hindred the Improvement of the 
true Philofophy. 
But here I ffiall put an end to this Jong Letter ; for 
the Freedom of which, I know, I need make no 
Apology to you, Sir, of whole great Candour I have 
for fome Years pad been a condant Witnefs ; and as 
I have frequently admired, how amidd the vad Em- 
ployments of your Profeffion, you Ihould find time to 
purfue with fo great Succefs fuch various forts of 
Learning ; fo I have as often been delighted to ob* 
ferve with what Benignity you receive thofe, who have 
made any the lead part of ufeful Knowledge their 
Study. 
/ anty Sir, 6fc. 
