I. MICROSCOPES AND ACCESSORIES. 



A. INSTRUMENTS OF HISTORIC INTEREST. 



1. Copy made by Messrs. R. and J. Beck of the com- 

 pound microscope said to have been invented and con- 

 structed about 1590 by Zacharias Janssen, spectacle- 

 maker, Middleburgh, Netherlands. The original is the 

 property of the Scientific Society of Zeeland. 



E. 19. 1878. 



2. Microscope, made by Benjamin Martin, Fleet St., 

 about 1750 ; with five objectives, stage forceps, and 

 ordinary forceps. Shagreen-covered case, with Lieber- 

 kiihn's reflectors, six slides, and an old-fashioned form 

 of live box. 



E. L 1882 



3. Culpepper microscope, made about 1790. 



Lent by E. Russell Ttudden. 1876. 



The stand consists of a circular brass base, from the circum- 

 ference of which arise at equal intervals three scroll-shaped legs; 

 these ' support the circular stage and above it the outer body- 

 tube, in which slides the body of the microscope proper. There 

 is no fine adjustment. The instrument is provided with a tall 

 obelisk-shaped mahogany case. 



4. Microscope with wooden and parchment body, 

 and small circular stage. 



Given by the Hon. W. F. R. Massey-Mainwaring. 

 E. 173. 1888. 



5. Reflecting microscope, made by Prof. G. B. 

 Amici, Director of the Observatory at Florence, for 

 Dr. Wollaston, about 1830. Given by Lady Pollock, 

 niece of Dr. Wollaston, to G. F. Pollock, Esq. 



E. 6. 1881. Given by G. F. Pollock. 



The stand screws into the lid of the box which serves to 

 contain the instrument The tube is long, and placed hori- 

 zontally, so that the observer looks forwards, not downwards. 

 There is a hole in the lower side of the tube just above the 

 stage, and over this a reflector at an angle of 45. The coarse 



