Mi croscopigal Essays. 



93 



the Hglits and {hades, the prominencies and cavities, and all the 

 varieties of different hues, tints, and colours, heightened by the 

 reflection of the folar rays condenfed upon them.' 5 Tranfparent 

 objects are alfo fhewn with greater perfection than in the common 

 folar microfcope. 



Fig. i, Plate V. reprefents the folar opake microfcope, 

 mounted for exhibiting opake objects. 



Fig. 2, is the fingle tooth and pinion microfcope, which is 

 mfed for fhewing tranfparent objects ; the cylindrical tube Y there- 

 of being made to fit into the tube F E, Fig. 1. 



Fig. 3, the Aider which contains the magnifiers ; it fits into a 

 dove-tail which is at the upper part of the microfcope, Fig. 2. 



ABCDEF, Fig. 1, reprefents the body of the folar micro- 

 fcope ; one part thereof, A B CD, is conical, the other, CDEF, 

 is cylindrical. The cylindrical part receives the tube G of the 

 opake box, or the tube Y of the fingle microfcope, Fig. 2. 



At the large end A B of the conical 1 part, there is a lens to re- 

 ceive the rays from the mirror, and refract them towards the box 

 HIKE. 



N O P is a brafs frame, which is fixed to the moveable circular 

 plate abc ; in this- frame there is a plane mirror, to reflect the 

 folar rays on the afore-mentioned lens. 



This mirror may be moved 1 into the moft convenient pofitiofi 

 for reflecting the light, by means of the nuts O and R. 



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