xiv The Microfcope explained . 
any other Ihape, let its form be what it may j but not 
with fo much fatisfadtion. 
Takeoff the circular head ADF, fig. 6. and then 
the upper part A D w r of the pyramid, fig. 6. fet the 
Jaft afide. Take out the grey glafs which is placed m 
the infide of the lower part of the camera when it is not 
in ufe, and put it into the hole p q, which is reprefent- 
ed at fig. 7. and then put on the cover Z Y 5 fcrew it 
fall: by the two fcrews, one of which is feen at e, and 
place the circular box ADF upon the cover Z Y, and 
bolt it fall:; then lay it upon a table as it is reprefented 
in fig. 7. the apparatus fig. 4. and microfcope fig. 5. 
with the object intended to be examined being firft pre¬ 
pared and placed within the box ADF, take the tube 
E F, with its femi-circle from the pillar A, fig. 2. (it 
feparates at N) and fcrew it to the end F, of the cir¬ 
cular box ADF, fig. 7. the rim with the oiled paper 
being firft removed. Now light the lamp and fufpend 
it on the ears G H. Sit down at the table and look at 
the grey glafs p q, and you will there fee a beautiful 
image of the object you have placed in the microfcope. 
After having adjufted the magnifier to its proper focal 
diftance, by turning the fcrew O, in fig. 5. and fhut 
too the doors R S, of fig. 6. in this fituation you may 
draw the out-lines of the objedt in the moft corredt man¬ 
ner, although the perfon is not accuftomed to drawing. 
It may be firft drawn upon the grey glafs p q, and then 
covering that with paper, and holding it againft the 
light, it may be finely copied upon the paper : or if you 
do not chufe to draw it twice, place a piece of thin paper, 
vellum, &c. upon the glafs p q, and it may be drawn 
at once. 
The reprefentation of microfcopic objects in this eafy 
manner without the light of the fun, is extremely enter¬ 
taining, as they appear in the higheft degree a very fine 
pidture. By this means we have obtained a very valua¬ 
ble 
