CONTENTS. 
XXXV 
(3) Illuminating- and other Apparatus. rxoa 
Nelson, E. M. — The Substage Condenser: its History , Construction , and 
Management ; and its effect theoretically considered ( Plate II .) .. Part 1 90 
Wulfing, E. A. — Apparatus for rapid change from parallel to convergent 
polarized light in connection with Microscope (Figs. 4 and 5) .. .. „ 105 
Bulloch’s (W. H.) Improved Filar Micrometer (Fig. 6) „ 106 
Lindau, G. — New Measuring Apparatus for Microscopical Purposes (Fig. 15) Part 2 252 
Grosse, W . — Polarizing Prisms 
Govi, G. — A new Camera Lucida 
Lighton, W. — A new Ocular Diaphragm (Figs. 16-19) .. .. .. 
Hyatt — Substage Condenser 
Nelson, E. M. — New cheap Centering Substage 
Bausch & Lomb’s Condenser Mounting with Iris Diaphragm (Fig. 48) 
Malassez, L . — New Lens-holder with Stand 
Lautenschlager, F. & M. — Heating-Lamp with Electric Regulator for 
controlling the Gas-supply 
Wilder, H. M. — Polarization without a Polarizer 
Brunnee, R. — On a new arrangement in Microscopes for the rapid change 
from parallel to convergent light (Figs. 56 and 57) 
Schiefferdecker, P. — Kochs- Wolz Microscope Lamp (Figs. 58 and 59) .. 
Pfeffer, W. — New Hot Stage and Accessories (Figs. 60-63) 
„ „ Water Thermostat (Fig. 64) 
Altmann’s (P.) Thermoregulator (Fig. 72) 
Miquel, P. — Metallic Thermoregulators 
Roux — Thermoregulator for large Drying-stoves and Incubators ... 
Beyerinck, M. W. — Capillary -siphon-dropping Bottle 
Unna, P. G. — Steam-filter 
Thompson, S. P. — New Polarizer 
Selle, Gustay — Microscope Mirror for Illumination by Reflected Light 
(Fig. 86) 
Watkins, R. L. — Electro-Microscope Slide for Testing the Antiseptic Power 
of Electricity (Fig. 87) 
Edinger, L . — New Apparatus for drawing Low Magnifications (Fig. 88) .. 
Behrens, W. — Glasses for keeping Immersion Oil .. 
253 
254 
„ 255 
„ 256 
„ 257 
Part 3 405 
405 
5) 
406 
406 
Part 4 
v 
Part 5 
519 
520 
521 
524 
651 
5? 
*5 
651 
652 
>5 
Part 6 
652 
652 
810 
810 
810 
811 
812 
(4) Photomicrography. 
Mayall, J., jun. — Photomicrographs and Enlarged Photographs .. .. Parti 107 
Walmsley, W. H. — Handy Photomicrographic Camera (Fig. 20) .. .. Part 2 257 
Capranica, S . — On some Processes of Photomicrography „ 261 
Taylor, T. — New Flash-light for Photography „ 263 
Pringle, A . — Notes on Photomicrographs exhibited at R.M.S. , 19 Nov. 1890 „ 263 
Fayel — Photomicrography in Space „ 265 
Comber, T. — Photomicrography Part 3 407 
Bibliography „ 411 
Baker’s (C.) Photomicrographic Apparatus (Fig. 65) Part 4 525 
Borden, W. C. — The Value of using different makes of Dry Plates in 
Photomicrography (Fig. 73) Part 5 653 
Marktanner-Turneretscher’s (G.) 1 Die Mi'.rophotographie als Hilfsmittel 
Naturwissenschaftlicher Forschung ’ „ 657 
Newhauss, R. — Magnesium Flash-Light in Photomicrography Part 6 812 
LumieIre — Coloured Photomicrograms ,, 813 
