6 
Bastin, A . — Bactericidal Power of the Blood 517 
Simmonds, N . — Flies and the Transmission of Cholera 518 
Zopf, W . — Sphxrotilus roseus, a new red aquatic Schizomycete 518 
Laer, H. van — Saccharobacillus Pastorianus 518 
Tizzoni, G., & E. Centanni — Hereditary Transmission of Immunity to Rabies .. 519 
Massart, J . — Chemotaxis of Leucocytes and Immunity 519 
Frenzel, J . — Structure and Spore- formation of Green Tadpole Bacilli 520 
Finkelnburg — Variability of Cholera Bacilli 520 
Bang, B . — Bacteriology of Swine-plague 520 
Wurtz, R., & R. Leudet — Pathogenic Action of Bacillus lactis 521 
Rake, B . — Tuberculosis and Leprosy 522 
Fischel, F . — Morphology and Biology of the Tubercle Bacillus 522 
Letzerich, L . — Bacillus of Influenza 522 
Reblaud, Th . — Bacterium pyogenes and B. coli commune 522 
Lewascheff, S. W . — Parasites of Typhus Fever 523 
D’Espine & de Marignac — Streptococcus isolated from Scarlatina-blood . . . . 523 
MICROSCOPY. 
Cross & Cole’s HandbooJc of Microscopy 524 
a. Instruments, Accessories, &e. 
Cl) Stands. 
Reichert’s Travelling Microscope (Fig. 60) 524 
„ Preparation Microscope (Fig. 61) 526 
„ Movable Stage (Fig. 62) 527 
Broavn, G. W., jun . — A Sliding Carriage and Stage for the Microscope (Figs. 63 and 
64) 527 
The Society of Arts Microscope 529 
(3) Illuminating* and other Apparatus. 
Griffiths, E. H . — Three new Accessories for the Microscope (Figs. 65-68) . . . . 530 
Rogers, W. A . — Filar Micrometers 531 
Reichert’s New Heating Apparatus (Fig. 69) 531 
„ New Cover-glass Measurer (Fig. 70) 532 
Sir David Salomons* Electric Lantern (Figs. 71 and 72) 532 
(4) Photomicrography. 
Deck, Lyman S . — New Heliostat (Fig. 73) 534 
Sternberg, G. M . — Photomicrographs by Gas-light (Fig. 74) 535 
Reichert’s New Photomicrographic Apparatus (Figs. 75-77) 536 
(5) Microscopical Optics and Manipulation. 
Czapski, S . — Theory of Optical Instruments 538 
Delage, Yves — On the Subjective Magnitude of the Monocular and Binocular 
Images in the Hand-lens (Figs. 78 and 79) 539 
Ewell, M. D . — Numerical Aperture (Figs. 80 and 81) 542 
(6) Miscellaneous. 
Cole, A. H . — Solution of the Dust Problem in Microscopy (Fig. 82) 546 
Visit to Bausch & Lomb’s Factory 548 
/?. Technique. 
(1) Collecting Objects, including Culture Processes. 
Miqtjel, P . — Culture of Diatoms 550 
Elion, H . — Cultivating Ascospores on Clay Cubes 550 
Sander — Growing Tubercle Bacilli on Vegetable Nutrient Media 550 
Pannwitz — Impervious Self-acting Self -regulating Stopper for Sterilizing Purposes 551 
Esmarch, von — Improvising Bacteriological Apparatus 551 
Schill — Rapid Demonstration of Cholera Bacilli in Water and Faeces 551 
K.OCH, R . — Present Position of the Bacteriological Diagnosis of Cholera 552 
„ „ Bacteriological Examination of Water for Cholera Bacilli 553 
