( 6 ) 



Protophjrta. wgb 



Dangeard, P. A. — Loicer Forms of Animal arid Vegetable Life . , .. 447 



BoRZi, A. — Structure of Nostochinex .. 448 



BoRNET, E., & C. Flahault — Heterocystous Nostocacese 449 



Arloing, S. — Effects of Solar Light on Bacillus antJiracii 450 



PosnxER, G. — BaciUus BrassicsR 450 



Katz, O. — Bacterium of Wheat Ensilage .. .. .. 451 



Arthur, J. C. — History and Biology of Pear Bligld 451 



Satastano, L. — Bacterium of rotten Grapes 451 



EiBBERT —Destruction of Pathogenic Schizomycetes in the organism 452 



GuTTMAN, P. — Lepra Bacilli 452 



Makotta, A. — Micro-parasite of Variola 452 



Fbankland, p. F. — Micro-organisms in the Atmosphere 453 



„ „ Distribution of Micro-organisms in the Air 453 



Frank, B. — Micro-organisms of the Soil ,. 453 



Adametz, L. — Bacteria in the Soil 454 



BoLTOV, M. — Bacteria in Drinking-water 454 



WoLFFHUGEii, G., & O. RiEDEL— 5ac/er»a in Water 454 



Katz, O. — Bacteriological Examination of Water 455 



Pbuddejt, T. M. — Bacteria in Ice 455 



MICEOSCOPY. 



a. Instruments, Accessories, &c. 



(1) Stands. 



'B\}V.c^i((j!. 3.) Perspective Microscope 456 



Casipbell's (Sib A.) i)f /crome^er ilf/cro«co2>e (Fig. 96) 457 



Watson-Dbapeb ilf/croscope (Plate IX.) 458 



Calkeb, p. J. P. van — Universal Projection Apparatus for Mineralogical 



Purposes 459 



Culpeper's Simple and Compound Microscopes {Wilson' s form') (Figs. 97 and 98) .. 459 

 'Hn.GZB.' s {A..) Tangent-screw Fine-adjustment {V'l^. ^Q-\Ql) .. ..461 



(2) Eye-pieces and Objectives. 



Ewell, M. D. — Apochromatic Objectives 462 



Westien, H. — Double Objectives loith a common field of view 462 



(3) lUuminatiniT and other Apparatus. 



UiiMER's (A.) Opaque Illuminator (Fig. 102) 462 



'Saguet's (A.) Dark-ground Illuminator (JFig. 103) 463 



Qvimby's (B. F.) Lamp-shade 463 



Hecrck's (H. Van) Comparfl<or (Figs. 104 aud 105) 463 



Vignal's (VV.) Hot Stage icith Direct Regulator (Figa. 106 and 107) 464 



JvLiEy's (A. A.) Immersion Heating Ajjparatus 466 



Klein, W. — Unequal Heating of Crystal Sections 467 



Lipez, F, — Culture Glass for exaudning Micro-organisms (Figs. 108 and 109).. .. 468 

 Schiefferdecker's (P.) Apparatus for Marking Microscopical Objects (Fig. 110) .. 468 

 Bertrand, E. — Microscopic Measurement of Indices of Befraclion and Axial Angle 



of Minerals 468 



Bertiiand's(F.) i?e/Vac<o»ne#er (Fig. Ill) 469 



Henocque — Hxmatosco2)y (Figa. 112-115) 470 



Hatem's (G.) C/iroi>i(me<er (Fig. 116) 472 



KboustchoffK.de — Spectrum Analysis in Micro-Mineralogy (Fig. Ill) 472 



(4) Photomicrography. 



Photographic ^^jpora^Hs /or <fe€ Microscope (Figs. 118-143) 473 



Dagron's itficropfeo^ograpAic .4^para^^ (Figs. 144 and 145) 487 



BovsPlEhB^S ^ Guide to the Science of Photo-micrography' 488 



(5) Microscopical Optics and Manipulation. 



GtJEBHABD, A. — Magnifying Power of Dioptric Instruments 490 



Gage, S. H. — Care of the Eyes in Microscopy .. 492 



(6) Miscellaneous. 



JuDD, J. W. — Relations between Geology and the Mineralogical Sciences 498 



The ^UcnoscoFE in the Legal Profession 493 



Captain W. Noble OTid </ii« Jowrnai 494 



$. Technique. 



(1) Collecting: Objects, including CiUture Processes. 



Plaut, n. C. — Method for Preservation and farther Cultivation of Gelatin Cultures 407 



PtTRi, E. J. — Modification of Koch*8 Plate method 498 



