XXX11 CONTENTS. 



PAGE 



Merlin, A. A. C. E. — On Nelson's New Formula Amplifier .. .. 396 



Watson & Sons' New Objective Changer (Fig. 69) 461 



Bibliography < 461 



Gray, A. W. — An Easily Set-up Heliostat (Fig. 82) 579 



Polariscope and Microscope Lantern 580 



Chamberlain, C. J. — Artificial Light for the Microscope 702 



Zeiss' Apparatus for Examination of Ultra-microscopical Particles (Figs. 107-17) 702 



Bibliography 711 



(4) Photomicrography. 



Bibliography Ill 



Bagshaw, W. — Photographing Microscopic Crystals 24 2 



O'Donohoe, T. A. — lite How and Why of the Lippmann Colour Process (PI. IX., 



Figs. 33-6) 242 



Bibliography 360 



Forgan, W. — Photomicrography of Bocli Sections 461 



Bibliography 462 



Microphotographs 580 



Bibliography .. . 582 



Ives, F. E. — On the Use of the Escidin Screen in Photomicrography 634 



Wallace, R. J. — Grain in Photographic Plates 711 



Spitta. E. J. — On Suiting Contrast Screens for the Photography of Bacteria 



(Pis. XII.-XIV.) 712 



Bibliography 714 



° (5) Microscopical Optics and Manipulation. 



Everett. J. D. — Microscopic Resolution : Note on a Point in Lord Bayleigh's 



Paper of 1896 26 



Bibliography 112 



Nelson, F. M. — The Influence of the Antipoint in the Microscopic Image shown 



Graphically (Figs. 47 and' 48) 269 



Schaudinn, V. — Absorption and Emission of Air and its Ingredients for Light of 



Wave-lengths from 250 p. to 100 w ' 360 



Glazebrook, R. T. — Note on the Diffraction Theory of the Microscope as applied 



to the Case when the Object is in Motion 361 



Michelson, A. A. — Light Wares and their Uses 362 



London, E. S. — Simple Method for the Observation of Ultra-Microscopic Particles 362 

 Krl'ss, H. A. — Filtration of Ultra-Violet Bays through a Selection of Jena Optical 



Glasses 363 



Gifford, J. W., & W. A. Shenstone — Optical Properties of Vitreous Silica .. .. 363 



R.T.G. — Theories of the Besolving Power of a Microscope 364 



Everett, J. D. — A Direct Proof of Abbe's Theorems on the Microscopic Besolution 



of Gratings 385 



Rheinberg, J. — On the Influence on Images of Gratings of Phase Differences 



amongst their Spectra 388 



J amin's Circle for Befiexion, Befraction a7id Polarisation (Fig. 70) 463 



Zschimmer, E. — New Kinds of Glass of Increased Ultra-violet Transparency .. 464 



Barus, C. — Direct Micrometric Measurement of Fog Particles 464 



Bibliography 465 



Bibliography 582 



Conrady, A. E. — Tlieories of Microscopical Vision: a Vindication of the Abbe Tlieory 610 

 Legros, V.. & M. Stiassnie — Photogrammetric Focimeter for Microscopical Optics: 



an Instrument for Verifying Microscopies (Fig. 118) 714 



Desain's Apparatus (Fig. 119) 715 



Conrady, A. E. — Chromatic Correction of Object-Glasses .. .. 716 



Gordon, J. W. — Note in reply to A. E. Conrady' s Paper on Microscopical Vision.. 729 



Conrady, A. B.—Bf joinder 733 



_^ (6) Miscellaneous. 



Grubb, Sir H. — General Principle of some Novel Forms of Geodetical Instruments 



(Fig. 15) 112 



Czapski, S. — The Collected Treatises of Abbe 113 



