Summary of CaRRKNT Eeseahches, &c. — continued. 



Van HeurcFs Synopsis of Belgian Dialomaceie 648 



Vehgne's Belgian I)iutoms 648 



Peculiar Structure of Isthmia enervis 648 



Motion of Diatoms :, 649 



Microscopy. 



Ahre))8's Erecting Binocular Microscope (Figs. 135 SiTid 136) 651 



Crosslei/s Microscope tvith Special Arrangement for Illuminating the 



Swinging Suhstage (Jigs. 131 and. 138) 653 



Griffith (Jlub Microscope ■ 655 



Parkes's (Jhild's Portable Com2}ound Microscope (Fig. 13d) 655 



Silh-Mercer's Microscope (^Fig. UO) 656 



Sidle' s No. 4: " Acme" Microscope (Fig. lil) 657 



Baker's Students' Stephenson's Erecting Binocular Microscope (Fig. 142) .. 658 



Ve'ricJi's Dissecting Microscope (Fig. 143) 659 



Gundlach's " Periscopic " Eye-pieces 659 



Nachet's Objective Carrier (Figs. Hi &m\ lib) 661 



V^rich's Objective '' Extractor" (Fig. Ii6) 662 



Sliding Objectives 662 



Smith's Object Plate and Finder (Figs. HI and US) 663 



Wenham's Disk nimninator (Figs. Ii9 and 150) 665 



Smith's " V-shaped Diaphroifm" (Fig. 151) 665 



Value of Smnging Substages 666 



Botterill Ufe-slide (Fig. 152) 669 



BotteriWs Life-trough 670 



Hardy's Vivarium (Fig. 153) 671 



Simple Growing-slide 671 



Wigld's Groiving-slide .. .. 672 



Bartley s Warm-stage (Fig. 15i) .. 672 



Hume's Frog-plate (^ig. 155) .. 673 



Apparatus for Investigating Capillary Blood-pressure {in the Frog's Foot) 



(Figs. 156-159) .. 674 



Rogers' Micrometers 678 



Ideal Series of Objectives for Microscopical Work 679 



High Amplif cations 679 



Conditions of Microslereoscopic Vision — ^'■Penetration" 680 



Aloe's Stereoscopic Eye-piece 689 



Illumination for Binocular Microscopes with High Powers (Figa. 160 and 



161) 690 



" Working Distance and its relations to Focal Length and Aperture".. .. 692 



Invention of the Binocular Microscope 693 



Priority of Invention 693 



Colouring Living Infusoria, &c 694 



Unmixed Cultivation of different Bacteria 694 



False Appearances produced hy Hardening 695 



Haihs' Poly-microtwne (Figs, l&l a.nd 163) 696 



Williams's Freezing Microtome (Fig. 16i) 697 



Zeiss' s Microtome (Fig. 165) .. .. , 699 



Preparing Coal Sections 700 



Simple Method of making Rock Sections 701 



Tin-foil Cells 702 



Wax Cells 703 



Wax Cells — Decomposition of Glass 704 



Arabin for Mounting 704 



Mounting Diatoms in Substances of High Refractive Index 704 



Mounting Marine Algx 705 



Mounting Starches 705 



Moulding Opaque Objects with Beeswax 705 



Dry Mounting 706 



Semper' 8 Method for Dry Preparations 706 



Tale for Cover-glasses loith High Powers 707 



Micrometrical Researches on Contracted Muscle 707 



Prismatic Action of certain Microscopic Objects 707 



Carpenter'8^ The Microscope and its Revelations' 708 



The Microscope and the Origin of the Anatomy of Plants 709 



Evberson's ' Journcd de Photographic et de Microscopic ' 709 



*^ Societe Frangaise de Microscopic " 710 



Micrographical Mineralogy 710 



Stirling's Practical Histology 711 



Proceedings op the Society 712 



