XXll CONTENTS. 



PAGE 



MICROSCOPY. 



A. Instruments, Accessories, etc. 



(1) Stands. 



Bavsch & IjOiiB's Metallurgical Microscope, CCM (Fig. 1) 93 



(3) Illuminating- and other Apparatus. 



^ihhiAM8,K f':.— Interference Refractometer 94 



Hubert, H. — Use of the Stereoscope for Examining Superposed Projections .. .. 94 



G-LKB.K,'^. ^.—Microscope Illumination {¥\^. I) 228 



Kkeley, F. 3.— Polarization and Colour Effects exhibited by certain Diatoms .. . . 332 



Godspeed, T. U.— Modified Safety-razor Blade-holder for Temperature Control .. 395 

 Strutt, Hon. R. J .—Scattering of Light by Dust-free Air, idth Artificial Bepro- 



duction of the Blue Sky (1 ^g.) „ 395 



AiiiShiE,M. A.—Some Principles of niumination 397 



^^ysovDS,¥.Q.— The Polarization of Light 397 



^'i^Gvs,'ii.¥.,& Go.— The Barnard Incandescent Gas Lamp (\^g.) 397 



(4) Photomicrog-raphy. 



Coles, A. C. — Spirochaila icterohsemorrhagica 228 



EQGLESTOii.'H..R.— Photomicrographs in Colour 229 



Kodak, LmiTEB— Wratten^M" Filters (i figs.) 398 



Hallimond, a. F. — Telescopic Focussing Apparatus for Photomicrography (1 fig.) 400 



(51 Microscopical Optics and Manipulation. 



Guild, J. — Spherometer of Precision 95 



Gr.vtson, J. H. — Dividing-engine for Ruling Diffraction Gratings 229 



Merwin, H. E.— Dispersion and other Optical Properties in Carborundum .. .. 230 



Bale, W. M. — Measurement of Magnifying Power 230 



Merwin, H. E.— Optical Properties and Theory of Colour of Pigments and Paints 401 



(6) Miscellaneous. 



French, J. W.— Balsam P/oWem 230 



BoswELL, P. G. H,, & OTHERS — British Resources of Sands and Rocks used in Glass 



Manufacture, with Notes on certain Refractory Materials 231 



WmGHT,F.'E.—Petrogyaphic Microscope 231 



Chauot, E. M.— Chemical Microscopy 402 



B. Technique. 



CD Collecting- Objects, including Culture Processes. 



Bazin — Method for Discovering Fungi in the Sputum of Bronchitics 96 



CcTLER, D. W., & R. Williamson — Rapid Differentiation of Amoebae Cysts .. .. 96 

 ScHEiN, H. — Studies in Cattle-plague 96 



