\ 
6 o Of preparing and applying Objects* 
To difTedt minute Infects, as Fleas, Lice, 
Gnats, Mites, &c. and view their internal 
Structure, requires a great deal of Patience 
and Dexterity : yet even this may be done 
in a very fatisfactory Manner, by means of 
a fine Lancet and Needle, if they are placed 
in a Drop of Water : for their Parts will 
then be feparated with Eafe, and lie fair be¬ 
fore theMicrofcope, fo that the Stomach and 
other Bov/els may plainly be diflinguifhed 
and examined. 
We fhould always have ready for this 
Purpofe little Slips of Glafs, about the Big- 
nefs of a Slider, to place Objedts on oc~ 
cafionally ; fome of which Slips fhould be 
made of green* blue, and other different co¬ 
loured Glafs * many Objedls being much 
more diflinguifhable when placed on one 
Colour than on another. We fhould like- 
wife be provided with Glafs-Tubes of all 
Sizes, from the fineffc Capillaries that can be 
blown, to a Bore of half an Inch Diameter. 
I believe there is no better Way of pre¬ 
fer ving tranfparent Objedts in general, than 
by placing them between clear Ifmglafs in 
Sliders : but opake Bodies, fue-h as Seeds, 
Sands, Woods, &c, require different Ma¬ 
nagement and a Collection of them fhould 
be prepared in the following Manner. 
Cut Cards into fmall Slips, about half an 
Inch in Length, and the tenth of an Inch 
broad-: wet them half their Length with a 
flrong 
