( 4 ) 



SUMMABY OF CUBKENT ReSEAEOHES, &C. — continued. 



PAGE 



New Myxomycete _ .. 543 



Structure, Development, and Life-history of a Tropical Epiphyllous Lichen 544 



Vegetation of Street Gutters 545 



Formation of Tetraspores • • • 546 



Reproduction of Porphyra .. 54G 



Cryptogamic Flora of Arctic Ice and Snow 546 



Vaucheria- Gulls • 547 



Motion of Diatoms 547 



Fossil Diatoms of Austria-Hungary 548 



Diatom Types 548 



Microscopy, 



Bausch and Lomb Optical Go's New Binocular 548 



Fuse's Portable Dissecting Microscope (Figa. 91 B.nd 92) 550 



Holman Lantern Mirrosco2)e (Fig. d'5) 551 



Nelson's Student's Microscope (Fig. 94) 554 



Watson's Portable Swinging Mirror and Substage Microscope (Fig. 95) . . 554 



Walmsley's Pliotomicrographio Apparatus (Fig. 96) ..' 556 



Hauer's Pliotomicrographic Apparatus (Fig. 97) 559 



Seibert and Krafft's Small Camera Lucida (Fig, 98) 560 



WinheVs Small Camera Lucida (Fig. 99) 560 



Correction of the Distortions produced by the Camera Lucida (Figs. 100-102) 560 



Measurement of Microscopical Magnitudes (Fig. \Q2i) , .. .. 567 



Simple and Cheap Eye-piece Micrometer 570 



Nelson's Neio Nose-piece Adapter (^ig.XOi) 572 



Curties' Nose-piece Adapter (Fig. 1Q5) 572 



Zeiss' s Stage-Micrometer (Fig. \9Q) .. .. 573 



Queen's Holder for Woodicard's Prism (Fig. 101) 573 



Impromptu Condenser 574 



Hlumination by Sunlight 574 



Blue-tinted Lamp Chimneys, Light Moderators, &c 575 



Thompson's Polarizing Prism (Figs. 108-112) 575 



Depth of Vision in Photomicrography 679 



Value of Photography in Microscopical Investigations 5S0 



^66e'8 ^e/racfo7«e<e)- (Figs. 113-116) 581 



Befructive Indices and Dispersive Powers of Solids and Fluids 587 



" Tlie Genus Microscopista " 589 



Water Collecting-apparatus (Fig. Ill) 596 



Preparations of Coal 597 



Calhcart's Ether Mid-otome (Fig. 118) 597 



Glycerine Mounting 599 



Mounting Sections i7i Series 600 



Sealing up Preparations •• 601 



Opaque Dry Mounts .. .. ..: 601 



Examining Live Aphides .. .. 602 



Microscopical Examinations of Articles of Commerce 603 



Microscopical Separation of Wheat- and Eye-meal 603 



Hunting for Lost Glaciers icith a Microscope 604 



Microscopical Analysis of (he Structure of Iron and Steel 605 



Microchemical Reaction Methods 606 



Microscopical Examination of Dyed Silhs 607, 



Apparent Motions of Objects 608 



Phenc/mena of Motion (Fig. 119) 609 



Broicnian or Pedetic Motion 610 



Pbooeedings of the Society , 615 



