viii CONTENTS OF VOLUME VI. 
Erector, p. 62. American RE o Society of the City of New York, 
62. Improved Apparatus for Drawing with the Microscope, p. 62. 
Micro-spectroscope, p.62. Pr EE Life, p- 63. ‘‘ Power” of Lenses, 
. 119. Photographic Micrometer and Goniometer, p. 120. Wea Diatom 
Leo he Re 
Hoax, p. 12 d Blood-corpuscle, p. 121. A New Group of Infu- 
soria, 123. Structure of Minute Organisms, p. 123. Pure Water, p. 124. 
Railway Dust, p. 124. ases and Vapors in Micro-chemistry, p. 184. 
Microphotography, p. 185. Curious Varieties of the Liber, p. 185. Lep- - 
idopterous Scales, p. 186. cae Diamond Points, p. 186. Vitality as 
Affected by Temperature, p. 187. Microscopical Manipulations, p. 187 
Fibres of Flax and Hemp, p. 187. Darwinism and Histology, p- 187. 
Fungi, p. 187. Preservation of Fresh-water Polyzoa, p. 188. Crystalli- 
zation of Metals in Electricity, p. 488. Conjugation in Rhizopods, p. 188. 
pty by Black-ground IHumination, p. 188. Cleaning Diatoms, 
pit Microscopical Structure of the Vax or Bloom of Plants, p. 188. 
An uae: Mode of Capillary oa p. 239. The New Erecting 
Arrangement, p. 240. ote on Above Remarks, p. 241. Oblique 
Illumination, p. 241. Glycerine in 1 Microscop, p. 242. Practical Hise 
tology, p. 242. Variations in Size of Red Blood- longs p. 242 
Comparative Size of Red iari p. 248. Vitality of Organic 
Obj 
p. 243. Size of Blood-dises, p. 243. Tapices s and Plant-crystals, p. 244. 
Respiration i in arira w orms, p. 244. Development or Hydrodictyon, 
M The Mic 
altwood Finder, £ 245. The Microscope in the Lecture 
kaom. p. 814. Angular Jinik e, p. 315. Preparation He Preservation 
of Tissues, p. 315. Absorption of Solid Particles, p. 316. Multiplying 
Species, p. 316. Vavcionniedt of Vegetable and Animal Life, p. 317 
The Leucocytes, p. 317. ie and Endogens, p: 318. A Conspectus 
of the aroma p: Photo-micrographs Popularized, p. 318. 4 
Deep-sea Life, 373. . RE Life, p. 374. The Nature of Miasm, ' 
p- 3874. Eels in Pea . 375. The Origin of Guano, p. 375. Arbures- 
cent Silver, p. 375. Artificial Fossils, p. 376. Nomenclature of Objectives, 
p. 376. Corivctióna to Prof. Tuttle’s Paper in May NATURALIST, p*378. A 
New Erecting Prism. With cuts. p. 439. ese Binocular, p. 441. 
Opaque Illumination under High Powers, p. 441. Collins’ Light Cor- 
rector, p. 442. Measurement of Angular Aperture, p. 442. Organisms 
in Chicago Hydrant Water, p. 443. Record of New Fungi, p. 443. Podura 
Scales, p. 448. The Study of ‘difficult Diatoms,” p. 444. Cells for 
Mounting Objects, p. 497.. The Common Paraboloid as an Immersion 
Instrument, p. 498. Bichromatic Vision, p. 499. New Arrangement of 
Spring Clips, p. 499. Single Front Objectives, p. 500. pep eT at 
ae Aperture of Objectives, p. 564. Organisms in Croton Water, a 
6 Distribution and Action of Nerves, p. 565. ree Forms — 
