CONTENTS. 5ZXV 



PAGE 



Calijajjo, C. — Mechanical Stage icith Rectangi.dar Movements ., .. Part 2 ;^?37 



Professional Microscopy , 339 



Ahrens, C. D. — Xew Poiariziii;] Frism (^Fig. SI) Part 3 397 



ViALLAXEs' (H.) Photographic Microscope — Compound Images hy the 



Method of Successive Exposures (Figs. 82-84) „ 49S 



Beck's (R.) Demonstration Microscope (Fig. 85) „ 499 



Pkojectton Microscopes — Chevalier's (Fig. 86), Cooke's (Fig. 87), and 



Flossl's Electric (Figs. SS-91) „ 500 



Holmes' (S.) Microscope with Swinging Badial Mirror (Fig, 92) . . . . „ 505 



TsIayhr's Eissecting Microscope (Fig. 93) „ 507 



King, T. — Magic Lantern v. Microscope „ 507 



Inostkanzeff's (A.) Comparison Chamber for the Microscopical Study 



of Opaque Minerals and other objects (Figs. 9i and 95) .. .. „ 507 



GuNDLACH, E. — Astigmatic Eye-piece „ 509 



„ „ Immersion Objectives ,, 510 



SoRBT, H. C. — Application of Very High Powers to the Study of the 



Microscopical Structure of Steel „ oil 



WiCHMANN, A. — Use of the Microscope urith Convergent Polarized Light „ 513 



Flesch, M. — Experiments icith the Electric Incandescent and Arc Lights „ 513 



Mater's (A. M.) Black-ground Illuminator „ 514 



Titus's (C) iEonochromatic Illuminator (Fig. 96) „ 515 



GiLTAT, E. — Theory of the Camera Lucida (Figs. 97-101) , 516 



Vorce's (C. M.) Combined Focusing and Safety Stage for use in Micro- 

 metry tdth Eigh Powers (Fig. 102.) „ 517 



I^OGX^'s (J. H.) Life-Slide (Fig. 103) „ 519 



'Watso:s's (G.) Feversible Compressor (Fig. lOi) „ 520 



Rogers, W. A. — Euled Plate for Measurement of Blood-corpuscles .. „ 520 



Klonnt: ^^L- MuLLEE — Teast Counting Apparatus ,, 521 



EwELL, M. D. — Metal Micrometers „ 521 



Gage, S. H. — Circulation Plate for Frogs, 4'<^ „ 521 



MAhASSiiz's (L..) ffcemochromomete>' (Fig. 105) , 521 



Tm-HERY's (M. de) Exma-Spectroscope (Fig. 106) , 523 



SoKET, J. L. — Apparatus for Microscopical Observation of Vapour-drops 



(Figs. 107 and lOS) „ 524 



Kellicott, D. S. — An efficient Pipette „ 527 



Logan, J. H. — Device for enabling two observers to view objects simul- 



tanecnisly „ 528 



Fo'WELi/s {T.) Achromatic Oil-immersion Condenser „ 552 



Swift's Eadial Microscope „ 555 



Evans, F. H. — Photo-micrographs „ 557 



"Watson-Crosslet i/icroscope (R;. 113) Part 4 670 



BxvscK &'LoMB Optical Co.'s Physician's Microscope (Fig. Hi) .. .. „ 672 



Beck's (R.) Mineral 3Iicroscope (Fig. 115) „ 673 



Bevtges's (H.) Micrometer-Microscope (Fig. 116) „ 673 



GiACOiiiKis Microscope icifh large Stage (Fig. 117) „ 675 



Nachet's Corneal Microscope (Fig. IIS) „ 676 



Hopkins, G. M. — Use of the Microscope in the Mechanical Arts (Figs. 



119-128) „ 676 



KOGEKS, W. A. — The Microscope in the Workshop „ 679 



Klonn-e (J.) & Mvller's (G.) i>»«i)^raiw» (iVj/s. 129-134) „ 680 



Giles, G. W. M. — LicbcrkUhn Stops „ 681 



