( a8o )

When the Spot was near the middle of the Sun, it appeäred very broad,and almost Iquare, the Kuelcus of the fame Figure about 4o // . Diameter j butwhen it was near the Limb much narrower, and almost Oval : It feemed toliave Consistence enough to endure a sceond Return ; is it (hall, it will enterthe Vifible Disk of the Sun on the zith of May in the Evening, and in itspasiage over him describe a Line nearly Streight, with greater Latitude fromthe Eclipticis

Tofini in nhut XXVIII. One of the means used by M. Auyut to Enlighten an Object infuJuZ-1%,- "'hat Proportion one pleaseth, is by forne great Object Olafs, by him calleditghtncl by tl K a Planctary one, becaufe tliat by it he shews the difference of Light, whichAf^uzout. ull the Plancti rcceive from the Sun , by making use of feveral Apertures, pro-n.’ 4 , y. 68.' portionale to their Distances from the Sun, provided that for every 9 FootDraught, or thereabout, one Inch of Aperture be given for tlre Earth. Do-ing this, one fees, (siiith he ) that the Light which Mercury receives, is farenough from being able to Burn Bodies, and yet that the fame Light is greatenough in Satum to sce ciear there, seeing that (to him) it appears greaterin Satum, than it doth upon our Earth, when it is over-cast with Clouds,which ;'hc adds) would Icarce be believed if by means of this Olafs, it didnot senfibly appear so.

Mfwort”’ XXIX. The ALquinoxcs of this year 1699. according to the Obfervarionszclbaur. of M. Wort^ellaur at N urenbcrg, happened March 9. zch. 3yh xj". andn. -6% f. 6 23 . Sept. ix. ich. tx'. 4 x". which by his Tables ought to have been March 9.zoh. 40h 30". and Scpt. ix. ich. tpl. ^x' ! .

To Observe SoU* .

tc/ffi«.-, by XXX. For the well oblerving Solar Edisses, cast the Species ot the Sun!r. vlamstesd. t hrough a good Telelcope of a competent Length, on an extended Paper,1 55. (. 10 pj acc( j behind theEye-Glasi sb far, as that the säid Species may appear at least6 Inches over; then divide, both his Pcriphery into zbo Degrees for the bet-ter Oblerving the Inclination of the Cusps of each Phasis, and his Diameterinto Digits and their Parts by Concentrick Circles, for measiiring the quanti-ties of the oblcured Parts.

tAn Edisse oftbe Sun, Ann.1666. ]une 22.ut London ;by Mr. W il-loughby,

Or. Pope,

Dr. Hook, unihU\ Phillips.A If. f. S5-.

XXXI.

It was darkned

The Eclipsc began at yh.43^.~ Diam.—at 6

Digits.—at

Dig.-at

Dig.--at

o at

6

; ociip_

51

l'

Dig,

Dig.-at

J

7

5 Dig.-4 Dig.—

3 Dig--

x Dig,-1 Dig.-o Dig.-

h. 'at 7 6

•at 7 iz■at 7 10•at 7 x6■at 7 2x•at 7 37

Its Duration hence appears to have been one hour and 54/. Its greatestObjcurity Ibmewhat more than 7 Digits. About the middle, between thePcrpcndicul;« and Wellward Horizontal Radius of the Sua, viewing it through

Mr. Byle’s