So Microscopical Essays. 



A pair of forceps. 



Six large ivory Aiders, with tranfparent obje&s, and fix fmall 

 ditto with ditto. 



Fourteen wooden Aiders, with four opake objects in each Aider, 

 and two fpare Aiders. 



Some capillary tubes, for viewing fmall animalcula. 



The ufe and manner of ufmg the articles of the apparatus will 

 be more particularly explained when we defcribe the figures which 

 are delineated in Plate IX. 



Description of Cuff's double-constructed Microscope, 

 represented at Fig. i, Plate VII. A. 



This inftrument was firft defcribed by Mr. Baker, and recom- 

 mended by him. It was alfo defcribed by my father in the fourth 

 edition of his Micrographia Illuftrata, page xix. 



ABC reprefents the body of this microfcope ; it contains an 

 eye-glafs at A, a broad lens at B, and a magnifier which is fcrew- 

 ed on at C. 



The body of the microfcope is fupported by the arm D E, 

 from which it may be removed at pleafure. 



The arm D E is fixed on the Aiding bar F, and may be raifed 

 or deprefied to any height within it's limits. 



6 The 



