( 4 ) 



SuMMABT OF CuBBENT Reskabohes, &c. — continued. ^^^^ 



'^ Yelhio Cells" of Eadtolarians and Ccelenterates 244 



Coohe^ 8 British Fresh-water Algx 246 



Diatoms in thin Rock Sections 246 



Fineness of Striation as a Specific Character of Diatoms 247 



Schmidt'' s Atlas of the Diatomacem 249 



" Aphaneri" — Examination of Water 250 



Microscopy. 



^' Acme" Class Microscope (F\g. 29) 251 



Bromning's Portable Microscope (Figa. i^O and 31) 252 



Harting's Binocular Microscope (Figs. 32 and d3) 2.'i3 



Nachei' 8 Double-bodied Microscope-tube (Figs, di and 35) .. 255 



Wenham's Universal Inclining and Rotating Microscope (Plate IV.) (Figs. 



36-39) ^^^ 



Bausch and Lomb Optical Co.' 8 TricMnoscope (Figa. iQ and \V) .. .. 258 



" Hampden " Portable Simple Microscope (Figs. 42 and 43) 258 



Exclnding Extraneous Light from the Microscope 260 



Nachefs Lnproved Camera Lucida (Figs. H-^Q) 260 



Abbe's Camera Lucida (Fig. ^7) 261 



Curtis' s Camera Lucida Drawing Arrangement 262 



Drawing on Gelatine with the Camera Lucida 262 



Iris-Diaphragm f(yr varying the Aperture of Objectives (Figs. 48 and 49) .. 262 



Gundlach i-inch Objective •• 263 



Scratching the Front Lenses of Homogeneous-immersion Objectives .. .. 264 



Fluids for Homogeneous Immersion 264 



Advantage of Homogeneous Immersion 265 



Vertical Illuminator for examining Histological Elements 266 



Griffith's Parabolic Reflector 266 



Forrest's Compressorium (Fig. 50) 266 



Jttlieii's Stage Heating Apparatus (FigB. 51 and 52) .. .. 266 



Beck's Achromatic Condenser for Dry and Immersion Objectives (Figs. 53 



and 54) 270 



Pennock's OU! que Diaphragm (Fig. 55) •• 270 



Stereoscopic Vision with Non-stereoscopic Binocular Arrangements (Figs. 



56-58) 271 



Injection of Invertdtrate Animals 274 



Cold Injection Mass 27o 



Staining with Saffranin 275 



Staining with Silver Nitrate 275 



Staining Tissues treated with Osmic Acid 276 



Mounting the " Saw" of the Tenthredinidm 276 



Mounting Bviterfty-scales 277 



Imbedding Ctenophora 278 



Staining Living Protoplasm with Bismarck Brovm .. ^ 278 



Preservation of Infusoria and other Microscopical Organisms 279 



Staining the Nucleus of Infusoria 280 



Aniline Dyes and Vegetable Tissues 281 



Indol as a reagent for Lignified Cdl-membrane 282 



English's Method of Preseroing Hymenomyceles and Wild Flowers .. .. 283 



Mounting Salicine Crystals 283 



Bausch and Lomb Turntable (Fig. 59) 284 



Griffith Cell 284 



Bausch and Lomb Circle Cutter (Fig. 60) ^»5 



Wax and Guttapercha in Dry Mounting - 285 



Aeration of Aquaria 28b 



Pboceedings of the Society 289 



Treasurer's Account 292 



Eeport of the Council 293 



