CONTENTS. 



XXXV 



PAGE 



Cheeseman, E. L. — Groicing Slide . . Part 2 335 



Hardt's (J. D.) Direct Vision Camera ,j 336 



'B.OMOhOGOVS Sections, Electric Lightf and Molecules „ 337 



BoTSTON^-PlGCTT, G. W. — Limit of Angular Vision „ 339 



St. Claie, E. W. — Neic Electric Lamp „ 339 



Mayall, J. JuN. — Nobert's Billing Machine „ 377 



Beck, C. — Modification of the ' ' Complete " Lamp „ 380 



Heueck, H. VAN — '^ Beads" of Amphipleura „ 380 



ToLLES Memorial Fund „ 380 



Beck's "Star" Microscope (^Fig. 99) Parts 512 



Class Microscopes (A. Nachet, and Mueeay & Heath) (Figs. 100 



anc^lOl) „ 514 



GiACOMiNi's (C.) Microscope with large Stage {Figs. 102 and 103) . . „ 515 



Microscopes with Bent Body-tube {Figs. 104 and 105) „ 517 



OiA) Italian Microscope (^Fig.lQQ) „ 518 



Mullee's (P.) Insect-catcher with Lens — Insect-Cages (Beck & TiL- 



linghast) (i^z^s. 107-109) „ 519 



TlO\sies's(B,.'B.) Centering Stage (^Fig.llQ) , .. „ 521 



Diaphragms /or 5ec/;'s Vertical Illuminator (Fig. Ill) „ 522 



Stefbe^sq-s's (J. W.) Immersion Illuminator (Fig. 112) „ 523 



West's (Y.Jj.) Adjustable Dark-gro^md Illuminator (Fig. 113) ,. .. „ 523 



MiKEOB Diaphragms (Batjsch & Lome Optical Co.) (Fig. 114) .. .. „ 523 



Queen, J. W. — Centering the Illuminating Beam (Fig. 115) „ 524 



Be^tuasd's (E.) Adapter Mse-piece (Fig. IIQ) „ 525 



Kings for throwing the Coarse Adjustment out of Gear (Beck, and 



Powell & Lealand) (i^j^s. 117-119) „ 525 



Fabee-Domeegtje's (P.) Current Apparatus „ 526 



Moist Chamber ,, 526 



MacMunn, C. a. — Arrangement of the Microspectroscope „ 527 



BowEK, F. 0., & S. H, Vines — Examining the Spectrum of Chlorophyll „ 527 



VoECE, C. M., & E. Hitchcock — Multiplying Drawings „ 527 



White, T. C. — Value of Photo-micrographs .. .. „ 528 



PuMPHEEY, W. — Parallel Bays in Photo-micrography „ 528 



Koux & H. Van Heueck — Small Negatives — Bobinson's and Van 



Meurck's Miniature Microscopic Camera „ 528 



Amphipletjea pellucida and the Diffraction Theory „ 529 



Banks, 0. W. — Binnbock^s Slides of Arranged and Isolated Diatoms .. „ 530 



Beeckenfeld, A. H. — Graduated Glass Modifier „ 530 



Fabee-Dobiergue, p. — New Movable Stage „ 530 



FouLis — Oxyhydrogen Light „ 530 



Lancaster, W. J. — Lengthening Tubes „ 531 



Monocular v. Binocular „ 532 



MoORE, A. Y. — Homogeneous Immersion Objectives „ 532 



Nelson, E, M. — Short v. Long Tubes „ 533 



Rob. Crtjs. — Amateur Objectives .. „ 533 



IrfoBEnT's Diamonds .. .. „ 574 



Mayall, J. JuN. — Noherfs Biding Diamonds . . , . „ 574 



Crisp, F., & J. Mayall, Jun. — Gray's Water Microscopes „ 578 



Mayall, J. Jun. — Nobert's Buling Machine „ 580 



YtDY's Bevolving Stage Microscope (Fig. 13Q) Part 4 699 



c 2 



