CONTENTS. XXXIII 



iw.j: 



Societe Genevoise : Eye-pieces for Mineralogiaal and Petrographical Mii-roscopes 



(Figs. 44-46) .. .. ' 235 



Reichert's Spectral-ocular (Fig. 147) 646 



„ In lex-ocular (Fig. 148) 646 



„ Goniometer-ocular (.Fig. 149) 647 



„ Objective 64*3 



(3) Illuminating- and other Apparatus. 



Watson & Sons' Vertical Illuminator (Figs. 10-12) '.M 



„ „ "Grip" Stage-spring (Figs. 13, 14) 94 



Barnard, J. E. — Electric Mercuri/ Vapour Lamp for Microscopic Illumination 



(Fig. 15) .. ' 95 



Watson & Sons' New Mechanical Condenser Mount (Fig. 16) 97 



„ „ Aplanatic Low-power Condenser (Fig. 17) 97 



„ „ Macro-illuminator (Fiiz. 18) 97 



Bechstein's Photometer, with Proportional Graduation and Decimally-divided 



Scale (Figs. 19, 20) 98 



Bibliography 101 



Pearce's Total Reflexion Refractometer (Fig. 47).. 236 



Beck's New Illuminator for High-power Dark-ground Illumination (Fi<js. 48, 49) .. 238 



Troestek, G. — New Microscope Lamp (Fig. 50) 239 



Foccault's Heliostat (Fig. 51) 240 



Wollaston's Goniometer (Figs. 52, 53) 241 



Gueguen. F. — Reglet for Direct Reading in Microscopic Measurement-' 242 



Grimsehl's L Hi put- projection Lantern -12 



Dowdy, S. E. — A Micro-object Locater 242 



Halle, B. — Polarising Prisms 372 



Bell, L. — Note on some Meteorological Uses of the Polariscope 374 



Heimstadt, (J. — Reichert's Novelties in Mirror Condensers (Figs. 94-101) .. . 374 



Zeiss — Ultramicroscopy and Dark-ground Illumination 378 



Leitz' Kaiserling's Universal Projection Apparatus (Figs. 102-109) 378 



Bibliography 384 



Gordon, J. W. — Illuminating Apparatus for the Microscope (Figs. 119, 120) .. .. 425 



Siedentopf, H. — History of Mirror- Condensers 500 



Reichert's New Large Projection Apparatus (Fig. 129) 500 



Leitz' Dark-ground Illuminator for the Examination of Living Bacteria (Fig. 130) 502 



Gebhardt — New Easily Legible Micrometer Divisions (Figs. 150, 151) 647 



Gouy, M. — Apparatus for Measuring Micrometer Levels 648 



Bibliography tils 



Nelsox, E. M. — An Auxiliary Illuminating Lens (Fig. 158) 673 



Barnard, J. K. — Mercury Vapour Lamp for Microscopical Work Fig. 167).. .. 767 



Ignatowsky's New Reflecting Condenser (Figs. 168, 169) 768 



Reichert's Draioing Apparatus (Fig. 170 ) 770 



„ Marking Apparatus (Fig. 171) .. .. 771 



(4) Photomicrography. 



Moffatt, E. — Light Filters for Photomicrography (Plate I. figs. 3-6) 20 



Turneretscher's Apparatus for Photomicrography (Fig. 21) 1 < » 1 



Soheffer, W. — Scheffer's Microscopical Researches on Plate-grains 24:! 



Bibliography 244 



Lippmann, G. — Reversible Photographic Proofs; Integral Photographs (Fig. Ill)) ., 384 

 Chauvead, A. — Perception of Relief and Depth in the Simple Image of Ordinary 



Photographic Proofs: Conditions and Theory of this Perception 385 



Chaiveau, A. — Additional Demonstration of the Mechanism of Monocular Stereo- 



scopy 386 



Bibliography 387 



Haoron, S. D. M., & R. de Bercegol — Colour-screens for Colour-photography .. .">n:'> 



Rothe, M. E. — Interference Fringes produced by Photograph* in Colours .. .. 648 



Photography of very Translucent Diatoms at High Magnifications 649 



Dec. 16th, 1908 



