XXXIV CONTENTS. 



I'AUE 



Reichert's Objectives with Borguet'a Spring Safety Action (Figs. 44, 45) .. .. 249 



Bibliography 249 



Reichert's New Erect Image Preparation System for Preparation Microscopes 



(Fig. 62) 368 



Meyer, P. — New Method of using the Plankton Searcher (Figs. 63, 64) 869 



Waslem, G. C. van — Simple Form of Index Ocular 370 



Leitz' New Formula Object-glass 499 



„ New Objectives 500 



Malassez, L. — The Notation of Microscopical Objectives 500 



Chalmers, S. D. — Theory of Symmetrical Optical Objectives 501 



" H." — Construction of Aplanatic Combinations of Lenses with or without Achro- 

 matism 501 



Leitz' Camera Ocular (Fig. 92) 502 



Bibliography 502 



Stddnicka, F. K. — Tlie Abbe Condenser used as an Objective 644 



Strehl, K. — Discrepancy between Diffraction Theory and Geometrical Optics in 



Actual Instances of Telescope and Microscope Objectives 644 



Drysdale, C. V. — Direct Determination of the Curvature of Small Lenses .. .. 751 



(3) Illuminating 1 and other Apparatus. 



Reichert's Swing-out Condenser and Iris Diaphragm (Figs. 46, 47) 249 



Ross, H. C. — Electric Warm-Stage, for Use with the Microscope, combined with a 



Nernst Lamp to Illuminate the Microscope (Figs. 48, 49) 250 



Improved Methods of Working with the Vertical Illuminator 251 



C.Baker's Electric Lamp for the Microscope (Fig. 50) 252 



Pfeifper's Hot-Air Chamber (Fig. 65) 371 



Reichert's New Achromatic Condenser (Fig. 66) 371 



Stead, J. E. — Hluminator for Opaque Objects (Fig. 67) 372 



Bibliography 372 



Lazarus-Barlow, W. S.— New Hot Stage (Plate VII. ; Fig. 84) .. 419 



Leitz' Apparatus for Observation of Ultra-Microscopical Particles (Figs. 93 -95) . . 502 



„ Universal Projection Apparatus (Figs. 96-98) 504 



Beck, R. & J. — New Vertical Illuminator for Metallurgical Examinations (Fig. 99) 506 



„ „ Monochromatic Trough (Fig. 100) 507 



Leitz' Triple Revolver with Large Protection Diaphragm (Fig. 101) 507 



„ Thermometry Stages (Fig. 102) 507 



„ Drawing Board (Simple Form) (Figs. 103, 104) 508 



Holmes, JZ.—Polariscope .. •• 509 



Walsem, G. C. van — The Micro-pantograph as a Drawing Apparatus (Fig. 105) 509 



Koristka's Illuminator for Opaque Objects (Fig. 106) 510 



Bausch and Lomb's Improved Form of Camera Lucida (Fig. 107) 511 



„ „ Adjustable Drawing Board (Fig. 108) 512 



Bibliography 512 



Fischer, A. — Locking Arrangement for Microscopical Demonstrations 645 



Paul, R. W.— Optical Arc Lamps (Fig. 146) 646 



Locke's High Power Jet (Fig. 147) _ •• 6^7 



Leppin & Masche's Projection Apparatus with Optical Bench Extension (Figs. 



148-50) 647 



Eddjger's Projection and Drawing Apparatus (Fig. 151) .. .. 650 



Tandler, J. — Simple Apparatus for Drawing and Photographing Microscopical 



Sections 651 



Schott, O. — New Ultra- Violet Mercury Lamp {Uviol Lamp) 751 



Beck's Eyeshade (Fig. 172) 752 



Abbe Camera Lucida (Fig. 173) "52 



Beck's Parabolic Illuminat or (Fig. 174) , 753 



„ Parabolic Illuminator with Sorby's Reflector (Fig. 175) 753 



Bibliography 753 



