,.g . . f e N AT'U R A L H I S T O R Y $ƒ
^certainty of what he.^efired; The very inftrumept he made I
5 have now by me, and others pore perfc<%d by him, which
^douhtlefc he wou’d have Infinitely mended^ had he not been
iMIain unfortunately inhis late:. Majefty’s Service. He had a
Trktie of Qpticks m^y for the Prefs, hut though I %ave
“ ufed my utmoft endeavour to retrieve it, yet I have in that
“ point been totally unfiiceefsful: But fomefopfe Papers and
lt Letters, I have particularly about thisja§H»ie»t fprv taking
...of Angles* which was far frpp perfe^ ; JJetfr|helefis;|fip4jt
“ fa far to exceed all others, that I have ufed my endeavours (to
“ make itexaft, and eafily tra&able; ^bich above a Years finee
“ Ieffe&ed tomy own defire, by the help of an Ingenious, and
6 andexaft Watch-Maker in thele parts, finee which; time I have
# not altogether negleded it, hut employed it particularly in
u taking the diftances (as occafion ferved) of the Circum^Jovia-
“ Jifts, towards a perfeft fetling their motion. 1 fb.all only fay
“ pfit, that itisfmaU, notrgxceeding in weight, nor pu^h in
^bignefe an ordinary Pocket-Watch , exa£fly parking abpve
^‘ 400.00 Divifions, i n a , J$o£ ;by fibe help of two Inde,zjcs^ tfie
Sc one {hewing Hundred^ of Diyifiops, thp other Divifions
fioi the Hundred; Bvery laft i§; njy-.fmall• one
H containing i5 of an Inch,' and thatfi>,p^e^4y0a^;L^fe it,there
tc goes above Divifions to, a fecond. Yet Ihaye taken Land
u Angles fevefal times to one Divifipn, though (for the. reafon
“ mentioned by M.Auzmt) it be very hard toccome tothafc.ex'
^a&neft in the Heavens, {vizi) the fwift motionsof the Plarfets;
^ Yet to remedy that fault , I have deviled a reft, in which I
“ find no fmalrl advantage, and not a little pleafing thofe Per-
<$ fens whb have leen it; being fo eafy to be made, and bjethe
‘^oWerver managed without the help of another ; which fecond
^ convenience my yet namelefs inftrument. hath in great per-
tVfe&ion, and is-by reafon of its fmallnefs and' fhape, eafily ap-
« pltcaMe'tb^any' ifelefcope; Sir v i f you; think this invention
fe'tbusirnprovied^ worthy to be take notice of by the Curious,
“ jibumay command-a moreperfeft defcription of it,or any of the
« obfervations,either Mr.Gafetogne or my Self have made with it.
LAN jC A Sm iR ^ C^H€ S HLR "fa. 19
A Bèfcriptiml fife like Infirument referring toihi C V T.
TSgl ^ pifures;do reprefentxthe feveral Pambf
this Inftruraénts; the 4th.Figure part of the Teleicope
witL^èinftrapenfeapplyM to it*; andthe 5th, thewS m which
the w holerepo&th.
The firitFigure reprefènte the Box with the wholehaftmment,
|axcepting: onlyc the* movablë Cover) and; the Sferews*; by which
i& infixed Co the'Fdefcope. In this Figure (aadé) is a Ml-oh-
^fong brafs^Boxi,: %ying bpth to qoam th&Screws, .and- alfo to
make all; tfefevs»aLiöoveabIe parts of theinftrument to Move very
ftrue, fpooth^ and in a fimpfedirelb potrob > T&öm eBtf hereof
is ScMwed opairound flöj» ofbra# (Mbi) abo® f lifffi&i-
ver; the extreme Limb of whole óutflÉe *iMivklö#'i8tar k
qud; parts ,A ahdiqflniberMfb^ï^rs^^:;^. Through the
ariiddle of rhis Pkteji and the-middle of the Box (aadf is plated
aYery Cgfionfly Wrought Screw about the; bignefs of 4 Goo'fe
M M and of* thrlength of the Box, thee Head of which is by
a fixedfting, or. Shoulder on the infide ; and-a fmall fringing
Plate,' {(fit) on the outfide, fo adapted: to the Plate,. ;th^ ic is
flot ip t^ejteaftffubje#to fl]4ke;! Tkeotheaend ofi-thisScreW is
by anotherJittie, Screw (whofe fmall point fills the Center or
bole made in theend ofthe longer SerewfoB this purpofc) refi"
der dtfo fixt or fteady in the Box, that there appears pot the led!
danger of Ihaking, upon the Head;ofisMs Screw Without tóe
fpringing Plate is put oh a fnaall Index; feéfe and above that an
handle {mm) to turm the Screw round as often as there fhall be
occafion, withoutatall endangering the'dilpl&cing of tHeilfidcxi;
it being put onwery ftifFupon a Cylindrical part'of theMead, and
tho handle1 upon arfquare; the Screw hath that^tfiird iof itpwfiitrh
isiniext the Plate,bigger than the other twofthirds of it,byat: leaftas
mouckas+thedepthtofthe final! Screw made on it, the thread of thé
ScreW off the bigger third'; is as fmall again as that of the Sere#
o&the othat two thirds»;tó the groflfer Screw is adapted ^Socket,
<P faftnedl to a longBar or Bolt (^f); upöi? which is faftridd the
moveable