To the Right Reverend Father in God 
SEJH Lord Bifliop of ^^R'l^M. 
Idy L O R D, 
Affrehendd it my Duty in many reflects to dedicate to ymr 
Lordfhifth [mall Volume of the Philofophical Tranfafti- 
ons. lor W \ mght to remember, that 'tis nom about I'iori 6 
jears^ fince mr Lcrdjhif Geometrized Aftronomy, which 
did oblige, ^hg chief Aflronomers of this Learned Age 
And that jou addeaLife to the Oxonian Sparkles J meanithat Mee^ 
ting) which may becalled the Embryo or Firfi Conception of the^ 
Royal Society / Ind that to vindicate our Univerfities from s 
general Deluge 5 fihen many bad a ftnifter mind again them on 
dppeared publickly, tven in thofe rough times , Academiarum Vin- 
dcx. whence rve nay fuftly inferr^that you will receive much com- 
fort to fee hothtlninerftties contribute fo effectually by thir valua- 
ble Works to the Ahancement ofjolid Learning: In Oxford for the: 
Mathematicks anl Mechanicks 5 as jou may find here in the Ab- 
breviation fl/Mechaniea five de Mom ^c. And me had here alfa 
given you the Erie j of a Nohle Argument from Cambridge ^-ip/^- 
cerningO'iucks^ fm bad not waited for fome Geometrical Lec^ 
mn% from the fant Worthy Author j proper to be publijht with 
thofe his Opticks. Andifinthefore-going^Qlxmt fomeof the, 
chief branches of tk Mathematicks y Algebra y andot her parts of rt^ 
d Philofophy (inmichyour Lordfhip with much aff e^ionand fuc^ 
cefs bath the fe man^ years been happily concerned ) were diligent* 
ly fellicitedfor the ienefit of the Studious in thoje excellent Scierk- 
I hope^ we mij not immodeflly fay y that in this Volume, 
ipe have given m Accomft of fome further Jmpr&vemenis in-^ 
the fame kind(N, 45.45. 4^ 5 ) 4nd of a foundation laidyandin 
fome Tables commemd. for the reBifjing of Aftronomy bydfer- 
vjng Celeftial Appearances in mr Bnglifh Boris^on-.hy a Learned 
md Ingtnuous Fer^npho prof e^eth good rel:peSh andreaMn<f$ of- 
fervicc to th^ R, Society iV/ 55. 
My Lord, / mijl here forbear at large toreprefent Hmmiuh 
you have contributed to thepromoting ai parts of con fider able knm-- 
iedgeyboth by your om private studies^ andin ^UnSMremth the 
faidSo€ktY.fince its i nftittltion* I mJlSs rather ureful, tbdS^- 
