$6 Of the Solar Microscope. 
fatten a Paper upon the Screen, and trace if 
out thereon, either with a Pen or Pencil, as 
it appears before them. 
It is worth their while, who are defirous 
to take many Draughts this Way, to get a 
Frame, wherein a Sheet of Paper may be 
put or taken out at Pleafure for if the 
Paper be Angle, the Image of an Objedb 
will he feen as plainly almoH on the back 
as on the fore Side, and, by Handing be¬ 
hind the Screen, the Shade of the Hand 
will not obHrud: the Light in Drawing, as 
it mu ft in forne Deg ree when one Hands 
before it. 
I mutt obferve, that Dr. Liberkhun’s 
Solar Micr.ofcope had no Looking-glafs 
belonging to it, and therefore was of Ufe 
a few Hours only in a Day, when the Tube 
could be placed diredtly againH the Body of 
the Sun, and even then not without a good 
deal of Trouble : but, by this lucky Con¬ 
trivance of a Looking-glafs, the Sun’s 
Rays may be refledted through the Tube, 
whatever its Height or Situation be, pro-^ 
vided it fliines at all upon the Window, 
and that too with much Eafe and Ad- 
• , , • ft , r-- I 1 
vantage. 
C H A P, 
