CONTENTS. XXV 



" Contribution to the History of the Compound Mkrvscope." 



{Figs, im and IWl) Part 5 709> 



Standard Eye-pieces „ 711 



Grunow's Camera Lucida „ 713 



Standard Body-tube for Microscopes , .. „ 713 



Sliding Body-tubes „ 713 



McGaUa's Nose-piece .. .. .. ,, „ 713 



Smith's Rotating Stage „ 713 



Bausch and Lomb Optical Co.'s Compressors. {Figs. 138 



awe? 139) „ 714- 



Frog-plate. (Fig, UO) „ 715 



Apparatus for Examining the Circulation in the Lung and 



Mesentery of the Frog. (Figs, lil-lil) , 715 



Madans Modification of Darker s Selenite Holder. (Figs. 



148-150) „ 71& 



Sternberg's ' Photomicrographs and how to make them ' .. „ 720 



Photomicrography, hy Lamplight „ 721 



Focusing the Lmage in Photomicrography .. „ 722 



Aperture-shutter „ 724r 



Central and Oblique Light for Pesoluiion , . . „ 724^ 



Teasdale's Spot-lens , „ 72'£ 



Sogers' Microscopic Scissors „ 725 



Electric Light applied to the Microscope .. „ 725 



Substitute for a Rewlving Table ., „ 725 



Extreme Minuteness ., , „ 72& 



Watson's Student's Microscope „ 72& 



Relation of Aperture and Power in the Microscope . . . . Part 6 790" 



Schroder's New Camera Lucida. (Figs. 152, and 15S) .. „ 813 



" Optical Tube-length."' (Fig. 15i) „ 816 



Beck's Pathological Microscope. (Fig. 157) , „ 894. 



Chevalier's Microscopes ,, 896 



Swift §• Son's Pocket Microscope. (Figs. 158 and 159) . . „ 896 



Mirand's Revolver Microscope. (Fig. 160) „ 897 



Pelletan's " Continental " Microscope. (Fig. 161) . . , . „ 899 



Zeiss' s Miner alogical Microscope. (Fig. 162) „ 900 



Bausch and Lomb Optical Company's Fitting for Neutral 



Tint Camera Lucida. (Fig. 16^) „ 902. 



Testing the Binocular Arrangement „ 902- 



Bausch and Lomb Optical Company's Safety Nose-piece, 



(Fig. 161) „ 903 



Matthews' Device for Exchanging Objectives. (Fig. 165) „ 903 



Watson's Adapter Nose-piece. (Fig. 166) „ 904 



Boecker's Movable Stage. (Fig. 167) „ 904: 



Fol's Coinpressor. (Fig. 168) „ 905 



Slack's Tubular Live-box. (Fig. 169) „ 90& 



Wenham's Reflex Illuminator „ 907 



Practical Benefits conferred by the Microscope „ 907 



Bale's Simple Eye-piece Micrometer „ 908 



Microphotographs of Transplanted Teeth ,> 909 



Divisions of Micrometer Eye-piece „ 90& 



