( 4 ) 



Summary op Cuerent Eesearches, &c. — continued. 



PAGE 



Neic Species of Micrococcus 399 



Influence of Light on the Development of Bacteria 399 



Bacteria connected genetically icith an Alga 400 



Bacterial investigation of Sunlight, Gaslight, and the ligM of Edison's Lamp 401 



Microbia of Marine Fish 402 



Movements of Minute Particles in Air and Water 402 



MiqueVs' Living Organisms of the Atmosphere' 403 



Eeprodwtive Organs of Lichens 404 



Chromatophores of Algse 405 



Fhycochromacem 407 



Bangiacem of the Gtilf of Naples 408 



Sphxrozyga Jacdbi 409 



Algoid Structures in the Coal of Central Eussia 409 



Decomposition of Synedra radians hy Caustic Potash 409 



New Xanthidium 410 



Structure of Diatoms in the Jutland " Cement-stong" 411 



Motion of Diatoms 412 



Pfitzer's Diatomacex 413 



Microscopy. 



Bertrand's Petrological Microscope (Figs. 60-G2) 413 



Fuse's Portable Binocular Dissecting and Mounting Microscope (Fig. 63) .. 415 

 Klonne and Mvller's and Seibert's Demomtration Microscopes (Figs. 64 



and 65) 417 



Seibert's Travelling Microscope (Fig. G&) 418 



Klonne and Midler's ^' Pe7idulum Stage" (FigB. 67 and 68) 418 



Leiter and Mikulicz's Gastroscopes (Figa. 69 a,nd 10) 421 



Cobweb Micrometers 422 



Chevalier's Camera Lucida (Fig. 71) 423 



Gru7iow's Cam£ra Lucida (Fig. 72) .. .. 423 



HoUe's Drawing Apparatus 423 



Manipulation of the Bed: VeHical Illuminator 424 



Pease's '■'Facility" Nose-piece (Fig. 72.) 425 



German " Cylinder Diaphragms" and Condensers (Figs. 74-77) .. .. 426 



Finlieriielle's Apparatus for the Examination of Fluids (Fig. 7S) .. .. 427 



Moist Chamber 428 



Hartnack and PrazmoiosMs Polarizing Prism (Figa. 7d-S2) 428 



Apparatus for Eotating Polarizing Objects (Figa. 8S &nd 8i) 434 



Abbe's Spectro-polarizator (Fig. 85) 435 



Hartnack's Illuminating Apparatus for Monochromatic Light (Fig. 86) .. 436 



Physiology of Variable Apparent Magnification by the Microscope .. ,, 437 



Visibility of Euled Lines 439 



Preparing and Cutting Amphibian Eggs .. 442 



Preparing Sections of and Examining Embryos '443 



Imbedding 444 



Mounting Insects in Balsam icithoid Pressure 444 



Eeagent for Simultaneous Staining and Hardening 445 



Anilin Colouring Matters as Staining Media for Human and Animal Tissues 446 



Double Staining Nucleated Blood-corpuscles with Anilin Dyes 447 



Deehe's Microtome. — Cutting and Mounting Sections through the Entire 



Human Brain .. 449 



Schulze's Section-stretclier (Fig. 87) 450 



Preparation of Marine Algee 451 



Arrangement of Diatoms : 452 



Paper Cells 45;-{ 



Making Tinfoil Cells 454 



Ivory Drop-Black 455 



Selection of Cover-glass 455 



Labelling Slides 456 



Economical Cabinet for Slides 450 



Moller's Typen- and Probe-Platten 457 



Slack's Silica Films 457 



Utility of the Microscope in CJicmistry 458 



Preparing Thin Slices of Books and Minerals (Figa. 8^-89) 461 



Making Sections of Bock, Bone, Ivory, &c 407 



Proceedings or the Society 472 



