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Secondly, A way of shortning reflexive and refractive Tele-scopes.

Thirdly , A way for using a.Glass of any length , without mo-ving the Tithe.

Fourthly, An Instrument for taktng the Diameters of theSun, Moon and Planets, or for taking any other Distances, tofive or ten Degrees > to the certainty of a Second. Two of the seI promised in the 78 th. or last page of my Animadversions,and the other sell in as analogous to them.

Fifthly, An Instrument for describing all manner of Dials, bythe tangent projection.

ri. For adjusting the Hand of a clock, so ac to make it' move in the shadow of a Lid,whosestyle is parallel tothe Axis'. Or,

2. In the Azimuth of any Celestial Body , that is, in theshadow of an upright , or any other way incliningSixthly, Style, upon any plain.

The uses < 3.. For making a Hand move according to the true'**thereof ; quation of Time.

,. For making ad manner of Elliptical Dials, inMr. Foster’/ way, &c.

5. For communicating a circular motion in a CurveLine, without any shaking : And for divers otherexcellent purposes.

And first, Fora H ELK) S CO P E which shad so take•st the brightness of the Sun , as that the weakest eye may lookupon it, at anytime, without the least offence. My contrivanceis, By often reflecting the Rayes from the surfaces of blackGlasses, whieh are grownd very exactly, flat, and veryWell polished , so (o diminish the Radiations, that at lengththey become 4 s weak and faint as those of the Moon in thetwilight, so that one may with ease, and very much pleasure,view , examine and describe the phase of the Sun, and themacaU and facto!* thereof, if any such happen to appear whenthe Observation is made, and it gives a good opportunity ofdiscovering them, before we have any advertisement thereoffrouvothers; The reason of which will be sufficiently plainto such as consider, ho\v great a quantity of the rays of Light

is