0458 ) 
tip: of Ofticks ready for the Prefix but though I have ufed my 
utrnoft endeavour to -retrieve it, yet I have in that point been total- 
ly u'nfuccesful : But Tome loole Papers and Letters I have,particu- 
larly about this Inftrument for taking of Angles, which was fat 
from perfed:. Neverthelefs, I find it fo much to exceed all others, 
that I have ufed my Endeavors to mate it exaft, and eafily trada- 
ble; which above a Year fince I effeded to my own. defire, by the 
help of an Ingenious and Exad Watchmaker in thefe Parts : Since 
which time, I have not altogether negleded it, but employed it 
particularly in taking the Defiances (asoccafion ferved ) of the 
Gircum-jovialijls^ towards a perfect fetling their Motion. I fhall 
only fay of it, That it is fmall, not exceeding in weight, nor much 
inbignefs, an ordinary Pocket- Watch , exadly marking above 
40000 Divifions ina by the help of two Indexes ; the one 
fhewing hundreds of Divifions, the other, Divifions of the hun- 
dred; every laft Divifion, in. my fmall one, containing ^ of an 
Inch ; and that fo precifely, that,as I ufe.it, -there goes above 2, Di- 
vifions to a Second. Yet I have taken Land- Angles feveral times 
to one Divifion, though (for the Reafon mention’d byM. Auzouf). 
it be very hard to come to that Exadnefs in the Heavens, Viz . 
The fwift motion of the Planets Yet, to remedy that Fault, I 
have devifed zRejl^ in which I find no fmall advantage, and not a 
little pleafing thofe perfons who have feen it, being To eafie to be 
made, and by theObferver manag’d without the help of another : 
Which fecond Conven : ence, my yet namelefs Inftrument hath in 
great perfedion,and is, by reafon of its fmalnefs and fhape, eafily 
appliable to any Telefcope. Sir, If you think this Invention* 
* Care is taken, to thus. improv’d, worthy to be taken notice of by 
get both this .De- t he Curious , you may * command a more perfed 
obfervAtiens , Deicription of it, or any of the Obfervations, either 
from m. Tewniy,' M. Gafcoigne , or my felf have made with it. , 
Mort 
