XXXV ill CONTENTS. 



PAGE 



Himoff, M— Impiored Micrometer (Figs. 46 & 47) 408 



Zeiss, Messrs. Carl — Directions for using Glass Micrometers 538 



Beck, C. —Interferometer (Fig. 02) 539 



KEELEY, F. J. — Micro-spectroscopic Observation 539 



Ignatowsky, W. v. — History of the Cardioid Condenser : Memorandum on the Leitz 



Mirror-condenser 693 



Schaffnit, E. — Apparatus for Microscopical Observation of Frozen Objects (Fig. 



79) .. 693 



Leiss' Universal Spectral Apparatus (Figs. 80, 81) 694 



ScHl'LZ, H.— Glass Polarizing Prisms (Figs. 82, S3) 697 



Beckenkamp. J. — Aids to Crystalloptic Projection 698 



Kmrys-Roberts Microscope Lamp (Fig. S4) 698 



Tbiepel, H. — Model of the Vibration-planes of Light in the Polarizing Apparatus 



(Fig. 85) 698 



Leitz Liliput Arc-lamp 699 



Kohler, A. — New Nernst Lamp for Microprojection (Figs. 89, 90) 808 



Stednicka, F. K. — Sliding-objective Changers and Revolvers 810 



Koenigsberger, J. — Methods for the Identification of Sub-microscopic Structures 



(Figs. 91, 92) 810 



New Zeiss Nernst Lamp (Fig. 93) 810 



Nelson, E. M.— Winkel's Drawing Microscope (Figs. 94-96) 811 



Reichert's Dark-ground Illuminator with Arrangement for Centring on a Plain Stage 



(Figs. 97-99) 814 



(4) Photomicrography. 



Barnard, J. Edwin — A Simple Method of Obtaining Instantaneous Photomicro- 

 graphs (Fig. 1.) 19 



„ „ On the'JJse of a Metallic Electric Arc in Photomicrography 21 



MtJLLEB, R. — Simple Object-holder for Photomicrography : Tables of Magnifications 103 



Wratten & Wainwright's Photomicrography 103 



Boyer, J. — New Photographic Apparatus of the Paris School of Mines (Fig. 15) .. 103 



Bibliography 105 



Burling, L. D. — Photographing Fossils by Reflected Light (Fig. 40) 257 



Spitta, E. J. — A Report on the Grayson's Ridings presented by Mr. R. C. Beck to 



tlie Royal Microscopical Society 449 



Leitz' Small Photomicrographic Apparatus (Fig. 63) 540 



„ New Large Photomicrographic Apparatus (Fig. 64) 541 



Photomicrographic Apparatus for Photographing Insects (Fig. 65) .. .. 543 



Barnard, J. E. — Practical Photomicrography 544 



Orceta, Domingo de — Apparatus for Photomicrography with the Microscope 



standing in any Position, especially in Inclined Position (Figs. 70, 71 ) .. 588 



Bibliography 700 



Bagshaw, Walter — Instantaneous Exposure in Photomicrography 721 



Pigg, J. I. — Stereoscopic Photomicrography 816 



(5) Microscopical Optics and Manipxilation. 



Haeswaldt, Hans — Interference Phenomena in Polarized Light (Plate III.) .. .. 105 



Merlin, A. A. C. Elict — On the Measurement of Grayson's New Ten-Band Plate.. 160 

 Wright, F. E. — Transmission of Light through Transparent Inactive Crystal Plates, 



with special Reference to Observations in Convergent Polarized Light .. .. 409 

 ( hauveau, M. A. — Phenomena of Visual Inhibition which may accompany the re- 

 association of the two Retinal Images dissociated by the Prisms of the Stereo- 

 scope. Conditions and determination of these Phenomena 410 



Bibliography 410 



Amann, J. — Ultramicroscopical Study of Solutions of Iodine 545 



Bares, C. — Elliptic Interference with Reflecting Grating (Fig. 66) 545 



Bibliography 546 



Lendekfeld, R. yon — Observations on the Technical Execution and Biological Real- 

 ization of Microscopical Measurements 700 



Bell, L. — Opacity of Certain Glasses for the Ultra-violet 700 



Beck, C. — Pupil of an Optical System with regard to Perspective (Figs. 100, 101) 817 



