CONTENTS. XXXVU 



PAGE 



VoiGTLANDEB & So^s' Objectives (Fig. IIH) 731 



„ „ Eye-pieces 731 



„ „ Screw-micrometer Eye-piece {Fig. in) 732 



Bibliography 732 



For Society's Standard EYErPiECES, see Addendum to Index 826 



(31 Illuminating- and other Apparatus. 



Gordon, J. W. — The Use of a Top Slop for Developing Latent Powers of the 



Microscope (Plates I. to III. and Figs. 1 and 2) .. 1 



SiEMENS-ScHUCKERT Prq/ecfion 4pparrt<MS (Figs. 10-19) 97 



Jackson, H. — Stereoscopic Photo-micrographic Attachment for Monocular Micro- 



scopex {Fig. 20) 100 



Betto^C— A New SlidehMer (Figs. 21.22) 100 



Greil, a. — Application of the Nernst Incandescent Light to Biological Laboratories 102 



Swift's Spectroscope for the '■'Allan Dick" Petrologiccil Microscope (Figs. 29, 30) .. 220 



Draver's Improved Dirhroiscope (Fig. '31) 220 



Swift's Condenser for Dluminnting Large Objects (Fig. 32) 221 



,, Simple Hand Polarising Apparatus (Fig. 33) 221 



Herbert Smith iZe/'ractome/er (Figs. 34, 35) 222 



Nelson, Edward M. — An Improved Vertical Illuminator (Figs, id, 50) .. .. 282 



Beck-Thorv Diffraction Spectrosropes (Figs, b] -54:) 360 



Travis, W. R. — Expanding Spot for Dark Ground Illumination (Plate XV. and 



Fig8.5.5,56) .. .. .. ■ 362 



Reichert, C. — Description of a New Peflecting Condenser, by means of which Vltra- 



microsropic Particles are made Visible (Figs. 57-61) 364 



Ptv-sd's Simple Photometer (Fig. 62) 369 



Swift's Pan-aplanatic Low Power Condenser (Fig. 63) 370 



Hest, J. J. VAN — Demonstrating the Pseudo-vacuoles of Yeast-Cells (Fig. 80) .. 484 



Zeiss Dark Ground Illumination hy Stopping-off in the Immersion Condenser ., .. 485 

 Brodhun, TR. — Measurement of Light-absorption by means of Rotating Prisms and 



Motionless Sectors 485 



Dunn, Percy — Achromatic Illuminaior (Fig. SI) 485 



Bibliography 486 



Leitz, E. — Kaiserling's New Model of a Universal Projection Apparatus (Fig. 104) 627 



Schorr, G. — New Model of a Simple Movable Object Slide (Fig. 105) 628 



Reipp's Polarizer .... .. .. .. 629 



K'oristka's Achromatic Oil-immersion Condenser 629 



Bibliography 629 



Studnika, F. K. — Simultaneous Projection of Tivo Different Preparations in the 



Field of the Microscope ' . . . . 732 



SoMMiHFELDT, E. — Simple Method of Adjusting the Nicols in a Mineralogical 



Microscope 733 



Sieiientopf's Paraboloid Condenser : a New Method for Dark-field Illumination 



(FiiT. 118) ■ 733 



SiEDhNTOPF, H. — Dark-field Illuwination and Ultramicroscopy 735 



EwELL, M. D. — Measurements of some Modern Micrometers .. .. 735 



"Antares" Microscope Lamp 735 



Cheshire's Jp^-iomeier (Figs. 119, ]■ 0) 736 



FiDi^ger's Drawing and Projection Apparatus (Figs. 121-125) 736 



(4) Photomicrog-rapliy. 



Bibliography .. .. 103 



LiPPMANN, G., & OTHERS — Photography in Natural Colours 222 



Die Photographische Welt" — Purifying Gelatin 223 



Smith, A. E. — Note on Stereo-photomicrography .. - 224 



Wratten & Wainwright — Selection of Plates and Filters for Photomicrography .370 



Fran^ois-Franck, C. A. — Instantaneous Photomicrography 486 



Bibliography 486 



