XX XIV CONTENTS. 



(5) Microscopical Optics and Manipulation. 



TAGE 



Nelson, E. M. — A Reply to Professor Porter's and Mr. Everitt's Criticism upon 



my Paper on the Resolving Power, etc 1 



Porter, Alfred W. — On the Diffraction Rings for a Circular Opening ; and on 



the Limit of Resolving Power (Being a Rejoinder to Mr. Nelson). (Fig. 1) 3 



Gordon, J. W. — Mercury Globules as Test Objects for the Microscope (Figs. 2-6) .. 6 



Fahre. C. — Measurement of Resolution in Microscopy 103 



Filon, L. N. G. — New Method of Measuring Directly the Double-refraction in 



Strained Glass ' 103 



Uhler, H. S, & R. W. Wood — Atlas of Absorption Spectra 104 



Bibliography 105 



Nelson, E. M. — A Correction for a Spectroscope (Fig. 30) 150 



Tissot, C, & F. Pellin — Correction of the Astigmatism of Doubly Refracting Prism* 244 



Cantor Lectures— 77/eon/ of the Microscope 245 



Gaidukov. N. — Application of the fUtramicroscope (after Siedentopf) and of the 



Microspectral Photometer (after Engelmann) to the Textile and Dyeing 



Industries 387 



Bibliography 387 



Bibliography 649 



Henri, V. — Influence of the Medium on Brotvnian Movements 649 



Bibliography .. .. .. 650 



Nelson, E. M.— On the Resolution of Periodic Structures (Fig. 157) 671 



(6) Miscellaneous. 



QrKKETT Microscopical Club 105 



Compass Reading to ^^ or ^^ Millimetre (Fig. 54) 245 



Caliper with Micrometer Screw (Fig. 55) 245 



Qiekett M ieroseopical Club 246 



Merlin, A. A. C. E.—Flagellum of the Tubercle Bacillus 388 



Quekett Microscopical Club 3^8 



Bibliography .. .. 388 



Wood. W. J.— Microscopical Matters (Fig. 131) 503 



QrKKETT Microscopical Club 505 



Smith, J Ciceri — Direct re ding Micrometer-gauge for Cuver-glass (Figs. 132,133) 505 



" Brassfoundkr" — Composition of Brass 507 



Strachan. James — On Dendritic Growths of Copper Oxide in Paper (Plate XIII.) 544 



Ewell. Marshall D — The Present Status of Micrometry 682 



Rowntree, C. — Parafftnum liquidum B. P.) as an Immersion Oil 771 



Quekett Microscopical Club 771 



