CONTENTS. 
XXX 111 
PAGE 
Kerber, a. — On the Removal of the Chromatic Difference of the Spherical 
Aberration in Microscope Systems (Figs. 83 and 84) Part 6 778 
,, „ A Microscope System o/ 3*9 mm. focal length of Jena glass 
(%s. 85-89) .. .. .. .. .. „ 781 
Reinsch, 'P. F. — Introduction of a Universal Scale of Magnification of Micro- 
scopical Figures 787 
C3) Illuminatingr and other Apparatus. 
Heinsius, H. W . — Improvement in Abbe’s Camera Liicida . . 
ScHiEMENZ, P. — Breath-screen (Fig. 7) 
Klercker, J. af — Siphon Apparatus for cultivating living organisms under 
the Microscope (Figs. 8-10) 
Schulze’s Compressorium (Fig. 11) 
Rhumbler, L . — Apparatus for examming the developmental stages of In- 
fusoria under the Microscope (Fig. 12) 
Sacharoff, N . — Thermostat with Electro-magnetic Regulator (Fig. 13) 
Krutickij’s (P.) Microspectroscope 
Moseley’s (E.) Object-box (Fig. 14) 
Maddox’s (R. L.) Simple Substage Condenser 
„ „ Small Glass Rod Bluminator (Fig. 15) 
Screw Eye-piece Micrometers (Figs. 42-44) 
Koch, A. — Winkers Combination of Screw-micrometer and Glass-micrometer 
Eye-piece (Figs. 45 a7id 46) 
Mayall’s (J.) “ Jewelled ” Fine-adjustment 
Bausch & Bomb’s Condenser Mounting (Fig. 55) 
Nelson, E. M . — New Stage Micrometers 
Reyburn, R . — An easily -constructed Hot-stage (Fig. 56) 
Kayser — Application of Apertometer to the Microscope 
Plaxton, j. W . — A Camera Lucida for nothing (Fig. 57) 
Brunnee, R . — New Heating Apparatus for Mineralogical Investigations 
{Figs. 74-76) 
VoRCE, C. M . — Bolting Gauze 
Substages for Students’ Microscopes 
Jacobs, F. O . — An Illuminating Cell 
Bulloch’s Mechanical Stage with Vertical Pinions (Fig. 90) 
Part 1 94 
„ 94 
95 
96 
39 
39 
39 
39 
99 
Part 3 
96 
97 
98 
99 
99 
101 
388 
If 
391 
Part 4 507 
93 
93 
508 
508 
511 
512 
515 
Parts 664 
„ 665 
Part 6 788 
„ 795 
,, 795 
(4) Photomicrogrraphy. 
Kilt, Th . — Photomicrography 
Zettnow, E . — Silver Combinations of Eosin 
Bourdin’s (M. j.) Photomicrographic Apparatus (Fig. 26) 
Roux’s Lantern for Photomicrography (Fig. 27) 
Neuhauss, R . — Photomicrography at the Photographic Jubilee Exhibition at 
Berlin, 
Comber, T. — On a Simple Form of Heliostat^ and its application to Photo- 
micrography (Figs. 48-50) 
Piersol, G. a . — Some Experiences in Photomicrography 
Thil & Thouronde — Microphotographs of Wood Sections 
Hitchcock, R. — The Coloured Screen in Photomicrography 
Pringle, A . — New Photomicrographic Apparatus 
Pringle’s Photomicrographic Apparatus. (Plates XII. and XIII.) .. 
Sternberg, G. M. — Photomicrography by Gaslight (Fig. 77) 
Neuhauss, R. — Position of the Light-filter in Photomicrography 
1890. 
Part 1 
Part 2 
102 
102 
240 
241 
33 
242 
Part 4 
Part 5 
429 
516 
519 
520 
543 
666 
667 
669 
