CONTENTS. XXXV 



(4) Photomicrography. pagb 



Photomicrography with the Aid of Ultra-Violet Light 103 



Jones, Chapman — Three- Colour Photography 104 



Thompson, J. — Photomicrography and Photomicrometry 106 



Bibliography •• 106 



Kohler, A., & M. von Rohr — Photomicrography with Ultra-violet Light (Figs. 



109-112) '.. .. 513 



Leitz' "Universal" Microphotographic Apparatus (Figs. 113-115) 518 



Bibliography 520 



J. W. Gordon's Apparatus for Photomicrography (Figs. 152, 153) C51 



Ries, J. — A Perfectly Steady Stand for Photomicrography 052 



Bibliography 052 



Beck's Vertical and Horizontal Photomicrographic Camera (Fig. 176) 753 



Taylor & Co's. Focusing Magnifier (Fig. 177) 755 



Bibliography 755 



(5) Microscopical Optics and Manipulation. 



Gordon, J. W. — The Tlieory of Highly Magnified Images (Figs. 1-24) 1 



Gifford — Aperture Table 106 



Mostyn, C. — Resolution of Amphipleur a Pellucida 107 



Biltz, W. — Pltramicroscopic Observations on the Decomposition of Sulphur from 



Thiosulphuric acid and of Selenium from Selenic acid 107 



Garnett, J. C. Maxwell — Colours in Metal Glasses and in Metallic Films . . .. 107 

 Chabrie, M. C. — Construction-Principle of an Optical Apparatus for obtaining 



very Large Magnifications \The Diastoloscope~\ (Figs. 27-29) 108 



Bibliography 109 



Conrady, A. E. — An Experimental Proof of Phase-Reversal in Diffraction-Spectra 150 

 Rheinberg, J. — The Influence on Images of Gratings of Phase-Differences amongst 



their Spectra (Plate IV.) 152 



Bibliography 253 



Conrady, A. E. — On the Application of the Undidatory Theory to Optical Problems 



(Figs. 74-78) 401 



Rayleigh, Lord — An Optical Paradox (Fig. 83) 417 



Treoster, C. — Dark Field Illumination 520 



Resolution of Grayson's Bands 521 



Rheinberg, J. — Doubling of Lines in the Abbe Experiments not due to the Dia- 

 phragms above the Objective 521 



Strehl, K. — Limit of Visibility of Isolated Elements in the Microscope 521 



Wood, R. W. — Achromatisation of Approximately Monochromatic Interference 

 Fringes by a Highly Dispersive Medium, and the consequent Increase in the 



allowable Path-difference 521 



Bibliography 522 



Conrady, A. E. — Theories of Microscopical Vision — Second Paper (Figs. 123-8) 541 



Stoney, G. J.— On" An Optical Paradox" (Fig. 129) 557 



Ozapski's Elements of the Theory of Optical Instruments 653 



Von Rohr's Image- Formation in Optical Instruments from the Standpoint of 



Geometrical Optics 654 



Strehl, K. — Diffraction-Image and Absorption-Image 654 



Bibliography .. 654 



Braun's Methods of Identifying Sub-microscopic Structures ; Allied Investigations 



on Double Refraction 755 



Prytz-Kopenhagen, K. — Microscopical Determination of the Position of a Reflecting 



Surface during Optical Contact 756 



Bibliography ,, .. 756 



(6) Miscellaneous. 



Bibliography 110 



LiNN.a:us and the Use of the Microscope 253 



Kingsfobd, T. G. — Method of Constructing small Glass Tanks (Figs. 51, 52).. .. 255 



