Summary of Current Eeseaeches, &c. — continued. 



PAGE 



Gundlach's Substage Befractor .. .. .. .. .. 692 



Silvered Convex Lenses v. Concave Mirrors .... , .... 692 



Binocular Vision in the Microscope . . . . 692 



Miniatured Images (Fig. 133) .. .. .. .. .. 693 



Black An nuli and Lines of Spherules and Threads 696 



Curiosities of Microscopical Literature .. . . .. .. 697 



Preservative Fluids for Animal and Vegetable Tissues, and Methods of 



Preservation .. .. .. .. .. .. .. 701 



Preparing Sections of Axis-cylinder . . . . 703 



Mounting Gizzards of Insects 704 



Preparing Tape-worms .. 704 



Staining and Preserving Tube-casts .. .. 705 



Method for Dry Preparations 705 



Preserving Infusoria 706 



Mounting Mosses and Hepatiae .. .. .. .. .. 706 



Preparing Bacteria of Tuberculosis .. ■-.'•> . 706 



Preparing Diatoms . .. ... 707 



Modification of Paraffin-imbedding 708 



Perenyi's Hardening Fluid . . . . . . 709 



Satterthwaite and Hunt's Freezing Section-cutter (Fig. 134) 710 



Windier' s Microtome Figs. (135 and 136) '..- .. .. .. .. .. .. 711 



Marsh's Section Knife Figs. (137 and 138) .. . 712 



Thanhoff 'er' s Irrigation Knife (Fig. 139) .. 713 



Differential Staining of Nucleated Blood-corpuscles .. .. 714 



Flemming's Modified, Method for Staining Nuclei 715 



Iodine-green for Human and Animal Tissues . . .. .. .. 716 



• Teichmann's Injection-mass . , . . 716 



Wywodzen's Injecting Material.. .. .. 717 



Mounting in Pure Balsam .. ...... .. .. ,. 717 



Centering Objects on the Slide 717 



Chalk Cells ..- .. 718 



Line and Pattern Mounting .. .. .. •• 718 



Kain's and Sidle' s Mechanical Fingers (Fig. 140) 721 



Venice Turpentine as a Cement . . 724 



Metal Caps for Glycerine Mounts .. .. , .. .. 725 



Nassau Adjustable Spiral Spring Clip (Fig. 141) . . .. .. =■> .. .. 725 



Green Light for Microscopical Observations 725 



Photo-Micrography .. .. .. .. .... 726 



Woodward' s- Photographs of Amplipleura and Pleurosigma. 727 



Microscopical Examination of Handwriting .. .. . . . . 727 



Examination of Sputa .. .. • 728 



Trichina-Examinations .. .. .. 728 



Continuous Observations of Minute Animalcula . . . . . . 731 



Microscopical Examination of Textile Fabrics .. .. 732 



The Microscope in Engineering Work . . . . • • • 733 



The Microscope in Metallurgy .... . . .... . . 735 



Micro-Chemical Methods for Mineral Analysis .... .. 736 



Microscopical Characters of Hailstones .. . . 741 



Appearances presented by Air-bubbles and Fat-globules in White and Mono- 

 chromatic Light (Figs. 142-145) 742 



