CONTENTS. 
XXXY11 
(5) Microscopical Optics and Manipulation. 
Aubert, A. B., & H. L. Smith — Index of Refraction 
Gotz, J. R. — Optical Glass 
Ebner, V. v. — Plane of Polarization and Direction of Vibration of the 
Light in Doubly Refracting Crystals (Fig. 30) 
Lovibond, J. W. — Measurement of Direct Light 
Ashe, A. — Determination of “ Optical Tube-length ” 
Czapski, S. — Theory of Optical Instruments 
Delage, Yves — On the Subjective Magnitude of the Monocular and 
Binocular Images in the Hand-lens (Figs. 78 and 79) 
Ewell, M. D. — Numerical Aperture (Figs. 80 and 81) 
Ambronn, H. — New Method for the Determination of the Refractive 
Indices of Anisotropic Microscopic Objects Part 5 697 
Klein, C. — On Work with a Polarization Microscope' and a Simple Method 
for the Determination of the Sign of the Double-refraction 
Part 2 
254 
» 
255 
r the 
256 
. . 
5* 
275 
Part 3 
389 
Part 4 
538 
and 
>> 
539 
542 
Sohncke, L. — Unusual Microscopic Images .. 
Beck, C. — Standard Tube-length for Microscopes 
698 
Part 6 791 
„ 814 
(6) Miscellaneous. 
The late Sir Richard Owen , K.C.B., F.R.S . .. .. Part 1 106 
Bacteriological Department of King’s College „ 107 
Fifteenth Annual Meeting of American Microscopical Society Part 2 258 
Scottish Microscopical Society ,, 258 
Tolman, H. L . — Microscopy at the World’s Fair Part 3 391 
Cole, A. H . — Solution of the Dust Problem in Microscopy (Fig. 82) . . . . Part 4 546 
Visit to Bausch & Lamb’s Factory „ 548 
Progress in Microscopy Part 5 698 
Tolman, H. L . — Microscopy at the Columbian Exhibition ,, 699 
The late G. Brook , F.R.M.S. „ 701 
Weir, W. W . — The Microscope in Public Schools „ 701 
Ingpen, J. E . — The late Mr. Charles Baker , F.R.M.S. Part 6 792, 808 
The late Mr. Joseph Zentmayer Part 6 793 
/?. Technique. 
Behrens’ Introduction to Botanical Microscopy . . 
Bibliography 
Cl) Collecting- Objects, including- Culture Processes. 
Petri & Massen — Preparing Nutrient Bouillon for Bacteriological Pur- 
poses Part 1 110 
Dahmen, M. — Degree of Alkalinity of Media for Cultivating Cholera 
Bacilli „ 110 
Troppau, P . — Method for Sowing Bacteria on Gelatin Plates and other 
Surface Media „ 111 
Miquel, P . — Culture of Diatoms „ 111 
Macchiati, L . — Cultivation of Diatoms „ 111 
Dahmen, M. — Preparing Litmus Tincture for Testing Reaction of Gelatin „ 112 
Marchal, E . — Sterilizing Incoagulable Albumen „ 112 
Rouart, Geneste, & Herscher — Sterilization of Water by Pressure .. „ 112 
Altmann, P. — Thermo-Regulator for Petroleum Heating „ 113 
Russell, H. L. — Apparatus for Obtaining Samples of Deep Sea Water 
and from the Sea Bottom „ 113 
Part 1 109 
Part 6 796 
