ZOOLOGY AND BOTANY, MIOEOSCOPY, ETO. 337 



[Hitchcock, R.] — Black-ground Illummation and Polarized Light. 



[Objecting to T. West's condemnation of them, cf. vol. iv. (1884) p. 976. 

 " One might as well say, as Mr. E. M. Nelson does, that the use of 

 oblique light in microscopy is not desirable. ''] 



Ibid., p. 20. 

 „ „ 'Bed.Avag oi Amphipleura. [/w/m, p. 380.] 76(C?., p. 32. 



„ „ Postal Club Boxes. 



[List of preparations with remarks.] Ibid., pp. 32-4. 



„ „ Among the Dealers. 



[Account of a visit to opticians in Philadelphia and New York, and their 

 products.] 



Ibid., pp. 35-6. 



„ „ 1 in. American Objective of very wide angle unfavourably 



compared in Paris with a 25 fr. French. Also a 1/10 in. American (hom. 



imm.) favourably compared with a 1/12 in. English. Ibid., pp. 38-9. 



„ „ Beading of Amphipleura and photo-micrography. [Posf.] 



Ibid., pp. 42-5. 

 "Homologous Sections, Electric Light, and Molecules. — Mr. Edison has just 

 " completed and transmitted to Prof. F. G. FairJield, of the New York College 

 " of Veterinary Surgeons, an electric lamp which has the novelty of being 

 " probably the most minute ever constructed. . . . The instrument was made 

 " to illuminate a microscopic objective constructed upon the new discovered 

 " law of homologous sections. This lens renders it possible to obtain a power 

 " of sixty thousand diameters. At such a power only a section of a coloured 

 " corpuscle of human blood can be viewed at a time. Computing the molecule 

 " of living matter to be about a twenty-millionth of an inch in diameter, Prof. 

 " Fairfield believes it possible to project the image of it upon a screen with 

 " the help of the lamp, and to take photographs showing the molecular con- 

 " stitution of such complex bodies as albumen." 



Micr. Bulletin, I. (1884) p. 14. From " a daily paper." 

 Hunt, G. — The Triceratium favus — to Mr. Nelson. 



[Inquiry as to what he ought to see with a 2/3 in. and dark-ground illumina- 

 tion by the achromatic condenser. " Surely not the minute puncta in the 

 hexagons arranged in rows converging towards the centre of the triangular 

 figure of the diatom."] 



Engl. Mech., XL. (1885) p. 539. 

 Illumination of Microscopes and Balances. [Supra, p. 328.] 



Nature, XXXI. (1885) p. 440. 

 " Invicta." — See Short v. Long Body-tubes. 

 Journal of the Eoyal Microscopical Society (1884). 



[Review.] Joum. of Science, VII. (1885) pp. 95-6. 



„ „ „ „ [Note on.] 



Knowledge, VII. (1885) p. 177. 

 James, F. L. — The Deposition of Silver on Glass and other non-metallic surfaces. 

 [Describes principally the process of Liebig, Draper, Petitjean, and the 

 author.] 



Proc. Amer. Soc. Micr., 7th Ann. Meeting, 1884, pp. 71-80. 



KuKCKEL d'Heeculais, J. — Nouvcau valet compresseur pouvant s'adapter au 



Microscope et permettant I'examen de substances molles et opaques. (New 



Compressor adapted to the Microscope and allowing the examination of soft 



and opaque substances.) 



[Exhibition only.] Bull. Soc. Zool. France, IX. (1885), Proc. Verb,, xxiii. 



Lens, glory of [like that of a man is work]. 



Joum. New York Micr. Soc, I. (1885) p. 29. 

 LowiT, M. — Ein heizbarer Objecttisch fiir starke Vergrosserungen. (A hot stage 

 for high powers.) [Post.^ 



Zeitschr.f. Wiss. Mikr., U. (1885) pp. 43-6 (1 fig.). 

 M. Q. M. C— See Short v. Long Body-tubes. 



Madan, H. G. — On a Modification of Foucault's and Ahrens's Polarizing Prisms. 

 [Supra, p. 328.] Nature, XXXI. (1885) pp. 371-2 (1 fig.). 



Ser. 2.— Vol. V. Z 



