( 4 ) 



Summary of Curbent Eesearohes, &c. — continued. 



^ , . TAt 



Charoon-vaccine 4c 



Use of small Quantities of Virus in mitigating Effects of Inoculation . . 5C 



Manufacture of Vinegar hy means of Bacteria 5C 



Grains of Silica and Micrococci of the Atmosphere 5(i 



Structure and Development of the Cladoniese 5C 



New Maritime Algse 50 



Transformation of a Fertile Branch of Batrachospermum into Prothalliform 



Branch 50 



HaucMa, a -new Genus of Palmellaceie 50 



Formation of the Sporangia in Halimeda 50 



Spirogyras of the Environs of Paris 50 



Sykidion, a new Genus of Unicellular Algse 50 



Chroolepus aureum 50 



Arctic Diatomacex 50 



Classification of Schizonema 50 



Diatoms in thi7i Bock Sections (Figs. Hi and 115} 50 



Movements a7id Vegetative Beproduction of Diatoms 50 



Uses of the Study of Diatoms 51 



Microscopy. 



Houston's Botanical Dissecting Microscope (Fig. 116) 51 



Jauhert's Microscope (Fig. Ill) 51 



Verick's Skin Microscope (Fig. 118) 51 



Watson's Microscope-Stand (Fig. 119) 51 



Eye Shade for Monoculars (Fig. 120) .. ,. 51 



Diagonal Back-work and Spiral Pinion (Fig. 121) 51 



Neio Fine Adjustment 51 



Oil-immersion Objectives with Correction Adjustment 51 



Seiler's Large Stage 62 



Sliding Stage Diaphragms (Fig. 122) 52' 



Bousfidd's Botating Diaphragm-plate (Fig. 123) 52i 



Hyde's Uluminator or Oblique Immersion Condenser (Figs. 124 and 125) 52 



High Magnifying Power 52i 



Graham's Compressorium (Fig. 126) 52; 



Insect Cagfe (Fig. 127) 52i 



The Essence of Homogeneous Immersion 52i 



Abbe's Apparatus for demonstrating the Increase of Badiation in Media of 



higher Befractive Index than Air (Fig. 128) 52( 



Deby's Improved Growing-slide (Fig. 129) 52' 



Method for Colouring Infusoria and Anatomical Elements during Life . , 52' 



Double and Treble Staining 52i 



Preserving Confervas and Desmids ., 53( 



Preserving Marine Algx 53( 



Soap for Preparing and Cleaning Diatoms 531 



Sidlivant's Mechaiiical Fingers 53; 



Mounting with Glycerin-jelly 53i 



Mounting Starches 531 



Mounting Desmids 53( 



Wax for Dry-mounting Opaque Objects 53( 



Wax Cells with White Zinc Cement for Fluid Mounts 53? 



How to make Wax Cells (FigB. 130-133) 53J 



Gutta-percha Cells 5'i{ 



Apertures in Opaque Mountings 54C 



Copal Varnish 5-1] 



Test for Illumination (Fig. 134:) 541 



Microscopical Examination of Blood in (he Diagnosis of Disease .. .. 54'J 



Diatoms as Test Objects 54^ 



Examination of Metalliferous Clays ■ 544 



Microscopic Tests for Poisons 544 



Fine Bulings 644 



Journal for Physical and Biological Instruments 545 



New Microscopical Journal .. ., 545 



Seiler's Compendium of Microscopical Technology 546 



Smith's ' How to See with the Microscope ' 546 



Proceedings of the SociExy 547 



