( ^07 ) 
to have [ome farther Hints of four Conceit for that Tur^ 
fofe. One Means, I think, you told me voas, hy a ftngle 
Glafs in a Cane, ufon the Index of your Sextant, hy vphich 
f^as / remember) you find, the exati Point of the Sun's Rays* 
But the may how, I have quite forgotttn, and much defire: 
Tour Device for the exaSi Divifion of a ^adrant, hy divi- 
ding i I Degrees into i o Parts, I did then under f and, hut 
do not now fully remember. If it might not be too much 
Trouble to you, I Jhould intreat you to give me fuch a Paper- 
Demonfration thereof as you fhevred me, and two or three 
Lines plainly of the Z)fe thereof, how to find thofe [mall 
Parts. I loft the little Paper, wherein I noted the Moons r 
Diameter, which we ohferved when I was with you i I pray 
you fend it me, if.^ 8ic. 
I cannot conceal how much I am tranfported beyond my 
felf with the Remembrance fof that little I do remember) of 
thofe admirable Inventions which you [hewed me when I was 
with you. I fhould not have believed the World could have 
afforded fuch exquifite Rarities, and I know not how to flint 
my longing Deftres, without fome further Tafte of thefe fe- 
lelled Dainties. Happier had I been, had I never known 
there had been fuch Secrets, than to know no more, hut only 
that there Are fuch. Of all Defires the Defire of Knowledge 
is mo ft vehement, moft impatient : and of all kinds of Know- 
ledge, this of the Mathematicks affelis the Mind with mofl 
imenfe Agitations. I doubt not hut you can experimentally 
witnefs the Truth hereof, and one time or other have been no 
Stranger to fuch Thoughts as mine. And therefore although 
Modefty would forbid me to requeft any thing [until you 
give me leave) hut what you pleafe voluntarily to impart, 
yet the V chemence of my Deftre forceth me to let you know 
how much I defire, and how highly I fhould prize any thing 
that you fhould be p leafed to communicate to me in thofe 
Optick PraHices. Could 1 purchafe it with Travel, or procure 
it for Gold, / would not long be without ^ Telefcope for eh- 
A a a a a z fervinr 
