( xxi ) 



T A B L E 



O F 



C O N T ET N T S. 



G II A P. L 



A Concife Hiftory of the Invention and Improvements which 

 XjL have been made upon the Inurnment called a Microfcope 3 

 p. k 



c h a p. m 



Of Vifion, of the Optical Effect of Microfcopes, and of the 



Manner of eftimating their magnifying Powers, p. 28. 

 Adams's Lucernal Microfcope, p. 65. 

 Cuff's double-conftrucled ditto, p. 83. 

 Culpeper's Microfcope, p. 89. 

 Solar Microfcope for opake Objects, p. 92. 

 Common Solar Microfcope, p. 99. 

 Wilfon's Microfcope, p. 103. Ellis's ditto, p. 110* 

 Lyonet's Microfcope, p. 114. Withering's ditto, p. 115. 

 Botanical Magnifiers, p. 117..' Telefcopic Microfcope, p. ii\8*. 



6 



CHAP;, 



