D ED I CAT I 0 N. 
Study worthy a real Philofopher, but the inge- 
nious J 0 HN W I NT HR 0 P , Efq; your 
Grandfather, diftinguifh’d himfelf in the high- 
eft Rank of learned Men, by the early Ac- 
quaintance he contracted with the moft Emi- 
nent not only at Home, but in his Travels all 
over Europe , by the ftrict Correfpondence he 
afterwards cultivated with them *, and by 
feveral learned Pieces he compofed in Natural 
Philofophy; which indeed his innate Modefty 
would not fuffer him to publish immediately, 
* As might appear from the great Treafuft of curious Letters on 'various learned Subjefis 
fill in your Hands , E gr, from 
Earl of Anglefey. 
Earl of Arundel. 
Elias Alhmole, Efq j 
Rob. Boyle, Efq\ 
Tycho Brahe Otto - 
tildes » 
Lord Brereton. 
Lord Brookes. 
Lord Brounker. 
Dr. Browne. ' 
Jo. Camden. 
Dr. Charlton. 
Dorn. Chartes Jefuita 
Ludg, Bat. 
Lord Chan. Clarendon 
Dan. Coiwall. 
Ds. Comenius. 
King Charles II. 
O- Cromwell. 
Arthur Dee, M. D. 
Jo. Dee, fun. 
Dr. D ekinion. 
Sir Keneirn D’gby. 
Com. D rebel ius. 
Ernest us Cclcnijs 
Epifcopus 
Elect. 
jo-h. Efpagnet, Pr, 
Farl. Aquitan. 
Dr. Everard, Ox. 
Pet. Jo. Faber, M.D. 
Monfpelii. 
Gal. Galileo. 
J. Rud Glauber. 
Dr. Goddard. 
Pr inc eps Gothar. 
Dr. Grew. 
Mr. Hartlib. 
Dr. Haversfeild. 
J. Bapt. van Hel- 
mont, cui fuit unius 
vefperi amicus ille 
mirificus. 
J. Fred. Helvetius. 
Lord Herbert. 
Hans Albrecht Do- 
minus Herberftein 
& PraefeCtus Dal- 
matias. 
Joh. Hevelius Cos. 
Gedan. 
Sir Jo. Hey don. 
Fred. Princeps Hol- 
fatiae & D. Slefvic. 
Robert Hooke. 
Ch. Howard, after - 
•wards Duke of N or- 
folk. 
Ds. Jefle. 
Joh. Keppler. 
J. S. Kuffeler, M.D. 
Dr. Lovell, Ox. 
Earl of Manchefter, 
Lord Chamberlain. 
Dr. Merret. 
Dow. Michael, Mona- 
cbus. 
John Milton. 
Joh. de Monte. 
Sir Rob. Moray. 
Lord Napier. 
Mr. Ifaac, afterguards 
Sir Ifaac Newton. 
Mr. Oldenburgh. 
Dr. Pell. 
Earl of Pembroke. 
Pet. PeregrinusRown* . 
Albert Peterfon Am - 
fe't. vixit an. igo. 
Sir Edward Peto. 
Ds. Polemannus. 
Jo. Ray. 
Conrad. Roves Do- 
minus Rofenftein 
Margrav, in Croa- 
tia. 
Prince Rupert. 
Dr. Sackvile. 
Earl of Sandwich. 
Dr. G. Starkie. 
Lord Say and Seal. 
J. Slegelius in Ac. 
Franc. Med. . 
Prof. 
Sir Rob. Southwell, 
Dr. Sprat, Bijhop cf 
Rochefter. 
Princeps Sultsber- 
genfis. 
Ds. Tanckmarus, 
M. D. 
Jo. Tradefcant. 
Sir Philiberto Ver- 
natti. 
Dr. Wilkins, after- 
wards Bijhop of 
Chefter. 
Dr. Willis. 
Dr. Wither ly,Pr. Col» 
Med. Lond. 
Dr. Wcrfeley. 
Sir Henry Wot ton. 
Sir Chrift. Wren. 
Many of which you have given me the Pleafure of perufing j befides a great Number 
which it would take up too much Room here to recit e. 
and 
