338 SUMMARY or CURRENT RESEARCHES RELATING TO 



Geimm, J. — See Cohen, E. 

 GuNDLACH, B. — Magnification. 



[Keply to Mr. W. H. Bulloch's queries, ante^ p. 148.] 



Amer. Mon. Micr. Journ., VII. (1886) p. 20. 



The Microscope, VI. (1886) pp. 42-3. 



„ „ Astigmatism and its relation to the use of Optical Instruments. 



\_Supra, p. 313.] Ibid., pp. 1-4. 



Bull. Rochester (N. F.) Acad. Sci. {Sect, of Microscopy), 1886, pp. 4-7. 



Heueck, H. tan — Le Microscope a I'Exposition TJniverselle d'Anvers. (The 

 Microscope at the Antwerp Universal Exhibition.) (Coyitd.) 



[Microscopes of Boss and Zeiss — Trouve Battery and Helot-Trouve and 

 Van Heurck Photophore— Plioto-micrographs.] 



Journ. de Microgr., X. (1886) pp. 25-32 (7 figs.). 



Hitchcock, K. — Photo-micrography. III., IV. 



[2. Apparatus {contd.') (6) Microscope and accessories, Camera, &c. — ^Body- 

 tube should he lined with dead-black clotli. Working with or without 

 an eye-piece. Cameras of Scovill, Walmsley, Atwood, Stein, Aubert, and 

 Sternberg. Amplifier. Size of plates. Focusing arrangements. 3. Illu- 

 mination, with description and fig. of Kiibel's Heliostat.] 



Amer. Mon. Micr. Journ., VII. (1886) pp. 5-10 (5 figs.), 48-50 (1 fig.). 



HoEGH, E. V. — Die achromatische Wirkung der Huyghens'schen Okulare. (The 

 achromatic action of the Huyglieniati eye-piece.) 



[" It will perhaps be welcome to many to understand the nature of this 

 action, especially as in most books it is only stated, and not explained." 

 The explanation is mathematical, and cannot be abstracted.] 



Gentr.-Ztg.f. Optik u. Mech., VII. (1886) pp. 37-8. 



HoLMAN, D. S. — Instantaneous Microphotography. [_Supra, p. 333.] 



Sci.-Gossip, 1886, pp. 43-4. 

 Inosteanzeff, a. v. — TJeher sine Vergleichungs-Kammer zur mikroskopisehen 

 TJntersuchung undurchsichtiger Mineralien. (On a comparison-chamber for the 

 microscopical investigation of opaque minerals.) 

 [See Vol. V. (1885) p. 1058, and post.'] 



Neues Jahrh. f. Mineral., II. (1885) pp. 94-6 (2 figs.). 



I SEA EL, 0. — TJeher eine Erwarmungsvorrichtung als Ersatz der Jieizharen 

 Objecttische. (On a heating arrangement as a substitute for a hot stage.) 

 IPost.] Zeitschr. f. Wiss. Mikr., II. (1865) pp. 459-63 (3 figs.). 



Jadanza, N. — Ueher die Fundamentalpunkte eines centrirten dioptrischen 

 Systems und iiber das anaUaktische Fernrohr. (On the fundamental points 

 of a centred dioptric system and on the anallactic Telescope.) 



Centr.-Ztg. f. Optik u. Mech., VII. (1886) pp. 13-7 (8 figs.). 



Kellicott, D. S. — Dallinger's Moist Chamber. \_Supra, p. 326.] 



Amer. Mon. Micr. Journ., VII. (1886) pp. 26-7. 

 Laueent, L. — Sur I'execution des Objectifs pour instruments de precision. 

 (On the execution of objectives for instruments of precision.) 



[Describes his method of determining whether the defect of an objective is 

 incorrect curvature or defective centering of the lenses.] 



Comptes Eendus, CII. (1886) pp. 545-8 (2 figs.). 

 Lenses, the best only. 



[Exhortation to the student in biology or histology to use them.] 



Journ. New York Micr. Soc, I. (1S85) p. 224. 

 List, J. H. — XJeber einen Objecthalter mit Kugelgelenk. (On an object-holder 

 ■with ball-and-socket joint.) 



[See this Journal, V. (1885) p. 347.] 



Zeitschr. f. Wiss. Mikr., II. (1885) pp. 341-2 (2 figs.). 



Maetinotti, G. — Di una modificazione all' Apparato di illuminazione dell' 



Abbe. (On a modification of Abbe's illuminating apparatus.) \_Supra, p. 322.] 



Zeitschr. f. Wiss. Mikr., II. (1885) pp. 500-2 (2 figs.). 



