XXIV 



CONTENTS. 



Bulloch's Newer Congress Stand. {Figs. 114 and 115) .. Part 5 



Guillemare's School Microscope. (Fig. 116) „ 



Gundlach's College Microscope. {Fig. 117) „ 



Martens' Ball-jointed Microscope. {Fig. 118) „ 



Polarizing Microscopes ,, 



Schieck's Microscope with Large Stage. {Fig. lid) .. .. „ 



Projection-Microscopes. {Fig. 120) , 



Apparatus for Projecting an Image to any required Dis- 

 tance with Variable Amplification ,, 



Waechter's Travelling Dissecting Microscope. {Fig, 121) „ 



Measurement of the Power of Eye-pieces „ 



Hall's Eye-protector for use with the Monocular Microscope „ 

 Cramer's Camera Lucida (also Hofmann's and Oherhduser's). 



{Figs. 122-125) , 



Bausch and Lomb Optical Co.'s Fine Adjustment. {Figs. 



126andl27) „ 



Nose-piece for Binocular Prisms „ 



Homogeneous and Water-immersion Objectives — " Akakia " „ 



Collar-Correction of Objectives ' , 



Measuring Thickness of Cover-glass by Correction Collar . . „ 

 Bausch and Lomb Optical Co.'s Glass Stage and Slide- 

 carrier. {Fig. 128) „ 



Thomas' Vivarium. {Fig. 129) „ 



Bausch and Lomb Optical Co.'s Immersion Illuminator. 



{Figs. IdO and 131) „ 



Gundlach's Immersion Condenser. {Fig. 132) „ 



Symmetrical Illumination „ 



Gundlach's Substagc Refractor ,, 



Silvered Convex Lenses v. Concave Mirrors „ 



Binocular Vision in the Microscope „ 



Miniatured Images. {Fig. 133) ■., 



Black Annuli and Lines of Spherules and Threads .. .. „ 



Curiosities of Microscopical Literature ,. 



Light Modifiers , 



Schrauers Microscope „ 



Pelletan's " Microscope Continental " „ 



Apparatus for Examining Fluids „ 



Petrographical, Miner alogical, or Lithologic<d Microscopes. 

 — Rosenbusch, Fuess, Beck, Swift, ^c. {Figs. 150-155) .. Part 



^^ Jumbo" Microscope. {Fig. 156) „ 



" Midget " Microscope. {Fig. 156) „ 



Beck's Histological Dissecting Microscope. {Figs. 157 



and 158) ,, 



Gundlach's Globe Lens ,, 



Designation of Eye-pieces „ 



Objectives of small and large Aperture „ 



Correction-adjustment for Homogeneous-immersion Objectives „ 



Nelson' s Adapter for Rapidly Changing Objectives. {Fig. 159) „ 



Gundlach's Calotte Diaphragm. {Fig. 160) ,, 



Bohm's Wool-}7ieasurer. {Fig. 161) „ 



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