3 60 Of Things relating to Mathematical &c. Part IV. 
A Box of ANATOMICK Inftruments 3 ft. Saws, Steel 
and Ivory Knives, Chills, a Forceps, a Leaver, a Tenter, a 
Sirynge, Pipes, Probes, and Needles. 
S p C T. II. 
Of Things relating to the MATHEMATICKS ; 
and feme MECHANICKS. 
rr o Aftronomy. A REFLECTING TELESCOPE. Con- 
trived by Mr. Ifaac Newton, Profeffor of the Mat he- 
maticks at Cambridge. Whereby not only the cumber and 
charge of other Telescopes is avoided 3 one of thefe lefs than 
a foot long, magnifying as much as another of fix feet : 
but the Object likewife T both by a more regular Refraction, 
and a lefs expence of Rays, is much more clearly repre- 
fented. 
It confifts of a Tube open towards the Object, and clofe 
at the other end. Where is placed a Metalline Concave, 
inftead of an Objeft-Glafs. Near the other end, a flat Spe- 
culum, alfo of Metal 3 placed obliquely towards a fmall 
Eye-Glafs 3 fc* upon that point of the Tubes Axis, on which 
the perpendicular falls from the faid Eye-Glafs. So that the 
Rays coming from the Object, firft fall upon the Concave 3 
are thence reflected to the flat Speculum, thence to the Eye- 
Glafs, and through that deliver d to the Obfervers Eye. 
The Authors Defcription hereof at large 5 together with a 
Difcourfe of the Materials which are or may be thought 
fltteft for the Speculums 3 a Table of Apertures and Charges 
for feveral lengths 5 As alfo Mr. Hugeris de Zulithems Re- 
s'? 82. m ' niarques on the fame 3 fee in the Phil. Tranfatlions. (a) 
Arithmetic^. An Inftrument for working Queftions by 
Multiplying and Dividing. Contriv'd by Mr. Hook Who 
purpofes to give the Defcription hereof himfelf. 
Geography. A WAY-WISER. Given by Kffiop Wilkins* 
? Tis very manageable. It hath five Indexes pointing to (o 
many different Meafures,/^. Perches, Furlongs, Miles, Tens 
of Miles, and Hundreds of Miles 3 and turn'd about with 
as many Wheels. Made to Work in a Coach, thus 5 In 
the 
