CONTENTS. 
XXXI 
(3) Illuminating: and other Apparatus. page 
Nelson, E. M . — New Erecting Camera Lucida 21, 135 
Hildebrand, H. E . — Differential Object-carrier (Fig. 11) 101 
Czapski, S . — A new Drawing Apparatus (Figs. 12 and 13) 103 
Improved Form of Bernhard's Drawing Desk 100 
Forgan, W . — A Silver on Glass Camera Lucida 100 
Nelson, E. M. — Grayson's Rulings 134 
Gifford, J. W . — Monochromatic Violet .. .. 136,145 
Nelson, E. M . — Substage Apochromatic Condenser with Collar Correction (Figs. 
32-34) .. .. 229 
„ „ New Magnifying Lens with Combined Illuminator (Fig. 35) . . 232 
Lutzen, J. — Sources of Light for the Projection Lamp (Figs. 36 and 37) . . . . 233 
Rodenstock, J. — Wolff’s Hygienic Lamp-shade 235 
Gage, S. H . — Marking Apparatus for Indicating the Position of Objects or Parts 
of Objects in Microscopical Preparations 235 
Sawing Rock-sections 235 
Bernhard’s Drawing Desk (Fig. 38) 236 
Nelson, E. M. — “Loup” 236 
Czapski, S.— Illuminating Apparatus (Figs. 59 and 60) 363 
Monticelli, Fr. Sav . — New Compressorium (Figs. 61-65) 305 
Ziegler, H. E . — Compressorium 367 
Swift, J . — Nehon Microscope Lamp 393 
Janet, Ch . — Method of Indicating the Magnification in Drawings 475 
Nelson, E. M . — Reflector Lamp 498 
Watson’s Centering Underfitting 498 
Behrens, W. — New Hot-Stage with Regulation for Constant Temperature 
(Figs. 85-88) 581 
Delden, A. van — Auxiliary Apparatus for the Adjustment with Immersion Objec- 
tives (Figs. 89-91) 585 
Fuess, R . — New Object-Finder (Figs. 92 and 93) 587 
Edwards, A. M. — Use of Coloured Light in Microscopy 587 
Zeiss’ Correction Adjustment (Fig. 110) 687 
(4) Photomicrography. 
Lavdowsky, M . — Photomicrographic Apparatus (Figs. 14-17) 106 
Neuhauss, R . — The First Photomicrogram in Natural Colours 109 
Carlier, E. W., & G. Mann — Simple 3Ietliod of taking Photomicrographs of Opaque 
Objects 110 
Beck’s Vertical Photomicrographic Camera (Fig. 39) 236 
Bibliography 237 
Adee, A. A . — Stereoscopic Photomicrographs 353 
Letherby, A . — Notes on Podura Scale 390, 397 
Nelson, E. M . — Anastigmatic Photographic Lens 498 
Tylar’s Photomicrographic Camera (Fig. 94) 588 
Zeiss’ Photomicrographic Stand (Fig. Ill) 689 
(5) Microscopical Optics and Manipulation. 
Charlier, C. V. L . — On the Passage of Light through a System of Spherical Lenses 110 
Bache, R. Meade — The Secret of the Brownian Movement Ill 
Pensky, B., & A. Westphal — Mechanics and Optics at the World’s Fair at 
Chicago, 1893 112 
Amann, J. — 1 he Birefracto meter or Eye-piece Comparer 237 
Tutton, A. E . — Improved Method for the Microscopic Investigation of Crystals .. 307 
Carazzi, D . — Indication of Magnification in Micrographic Draivinqs 368 
Amann, J . — Resolving Power of the Microscope , and the Future of the Instrument .. 369 
Cox, C. F. — Relation of Aperture to the Determination of Minute Structure .. .. 588 
Stokes, A. C . — Limit of Microscopical Vision .. 589 
Strahl, K . — Diffraction Theory 689 
„ „ Compensation of Errors of Objectives 689 
Bolsius, H . — Indication of Magnification in Micrographic Drawings 689 
Marsson, Th . — Theory and Technique of the 3Iicroscope 690 
Zimmerm ann’s Introduction to Microscopy 691 
