Contents. 
page 
ObjectiYes and Eye-pieces l 
Apochromatic Objectives 7 
Compensating Eye-pieces 15 
Projection Eye-pieces 18 
Achromatic Objectives 19 
Huyghenian Eye-pieces 23 
Accessory Apparatus for testing Objectives 24 
Stands 26 
Specification and Prices of the various Stands 32 
Accessory Apparatus for the Microscope 
Illuminating Apparatus 57 
Appliances for changing the Objectives on the Stand 67 
Apparatus for measuring and counting microscopical Objects . . 70 
Drawing Apparatus 77 
Arrangements for Polarisation ... 79 
Spectroscopic Eye-pieces 81 
Various optical and mechanical Apparatus 85 
Apparatus for Photo-micrography 92 
Dissecting Microscopes and Magnifiers 100 
Microtomes HO 
Slips and Covers 112 
An asterisk denotes that the ' apparatus or optical combination so marked 
originated in our factories, i. e. was either introduced by us as new or, at any 
rate, first made by us in the manner here described. 
