with ^ Speculum; 15 
The Body of the Microfcope may alfo 
be fixt horizontally, and Objects may be 
viewed in that Pofition, by any Light you 
choofe ; which is an Advantage the Re¬ 
flecting Microfcope has not. 
It may alfo be rendered farther ufefnl, by 
means of a Slip of Glafs, one End of which 
being thrufl between the Plates where the 
Sliders go, and the other extending to fome 
Diflance, fuch ObjeCts may be placed there¬ 
on, as cannot be applied on the Sliders : 
and then, having a Limb of Brafs that may 
fallen to the Body of the Microfcope, and 
extend over the projecting Glafs a hollow 
Ring wherein to fcrew the Magnifiers, all 
Sorts of SubjeCls may be examined with 
great Conveniency, if a Hole be made in 
the Pedeftal, to place the Speculum exact¬ 
ly underneath, and thereby throw up the 
Rays of Light. 
The Pocket Microfcope thus fixt is, if I 
may prefume to judge, as eafy and pleafanfc 
in its Ufe, and as fit for the moll curious 
Examination of the Animalcules and Salts in 
Fluids, of the Farinas in Vegetables, of the 
Circulations in fin all Creatures: in fhort, it 
is as likely to make conflderable Difcoveries 
in ObjeCls that have fome Degree of Tranf- 
parency, as any Microfcope I have ever leen 
or heard of. It is alfo a material Part of the 
Solar , or Camera Obfcura Microfcope , which 
I fhall by and by defcribe. 
C H A P. 
