( 4 ) 



SuMMAKY OF CuBREHi Eksearohes, &c.- — Continued. 



I 



Parasites on Tohacoo 



Rape-disease : Pleospora Napi 8( 



RoseUinia {Rhizodonia) quercinu, a Disease of the Root of the Oak .. .. 8 



Olpidiopsie, the Parasite of Saprolegnia 8' 



Organic 'Dusts" of the Atmosphere 8! 



Green Racteriacene and Colourless Phycochromaceie 81 



BlueMUk 9; 



Mitigation of Fowl- Cholera Poison ^ 



Influence exerted on the Bacterium of Spleaic Fever hy Subjects refraetorxj to it ^ 



Further Observations on the Etiology and Prevention of Anthrax .. .. & 



Intravenous Injection of Symptomatic Anthrax as a means of Immunity . . 9. 



Algie of the Hercules Warm Spring 9 



Trichogyne of Hildebrandtia rivvXaris 9 



Plurality of Nudei in the Siphonex 9< 



Conjugation of Zoospores in DasyclaHus 91 



Sexual Reproduction of the Bangiacese 9^ 



Cladothrix and Sphserotilus 9'' 



Sycamina nigreseens, a Volvocinea destitute of Chlorophyll ^ 



Olceoeystis 91 



Chromophyton Rosanoffii 10( 



' Norwegian Desmids .. .. 10! 



Movements of Diatoms (Figa. 1-3) 101 



Grammatophora longissima. Petit 101 



MiCEOSCOPT, &C. 



Bausehand Lamb Optiecd Company's " Professional" and " Investigator" 



Microscopes (FigB. 'i-6) lim 



Crouch's Histological Microscope (Fig. 7) llfl 



Sidle' s New " Acme" Microscope IIM 



ToUes-Blackham Microscope (Figa. 8-10) 11» 



Reflection frcm the Inside of Body-lubes 118 



Adaptation of the '' Society " Screw to Draw-tubes 118 



Dr. Royston-Pigott's General and Transfer Finder (Fig. II) 119 



Angular Aperture— a Correction 120 



Low Powers of Large Aperture .. .. '.. .. 120 



Gundlach's Homogeneous-immersion Objectives .. .. 120 



Secure Method of Setting the Front Lens of Oil-immersion Objectives (Figs. 



12-14).. 121 



New Homogeneous-immersion Fluid of 1-5 Refractive Index 123 



Bausch and Lomb Optical Company s Slide-holder 124 



Beck's Rotating Holder for Rubber Cells (Fig. 15) 124^ 



Wallis's Calotte Suistage (Fig. 16) 125; 



Centering Nose-piece as a Substage (FigB. n &nd IS) 125 



May all's Spiral Diaphragm for Oblique lUuminaiion (Fig. \%) 126, 



High Amplifications 127 



Highest Magnifying Powers 130. 



Origin of Homogeneous Immersion 131 



The Essence of Homogeneous Immersion (Figs. 20 and 21) 131 



' The Northern Microscopist ' 1 34 



Dr. Maddox's modified Aeroconiscope (Figs. 22 and 23) 134 



HerpelV 8 MeUiod of Preparing Fungi for the Herbarium 136 



Simple and Speedy Method of Staining Animal and Vegetahle Sections .. 137 



Staining and Mounting PoUen •' 137 



Dry Mounts for the Microscope 138 



Carbdie Acid in Mounting .. •• .. 139 



Wax Cells 139 



Simple Device for Handling Thin Covers 140 



Mounting Clip (Fig. 2i) 141 



Arranging Diatoms, &c 141 



Holman's Compressoriiim and Moist Chamber (Figs. 25 and 26) . . . . 142 



Holman' 8 "Life Slides" (Figs. 27-29) 143 



Ma2)ping with the Micro-spectroscope 145 



Tubes for Conveying Moist Specimens, Dialomacex, &c., by Post .. .. 145 



Glass Crystals {Fig. 30) 146 



Pboobedings of Society (Figs. 31-35) 147 



