564 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Deby, J., and F. Kitton. — A Bibliography of the Microscope and Micro- 

 graphic Studies, being a catalogue of books and papers in the library of J. Deby. 

 Part III. The Diatomacese. (Part 3 in advance of Parts 1 and 2.) 



8vo, London (privately printed) 1882, 67 pp. 

 Dippel, L. — [Review of Dr. H. Van Heurck's paper on homogeneous-immersion 

 objectives and fluids (cf. this Journal, ante, p. 264), preceded by a statement of 

 his reasons for objecting, in opposition to Dr. Van Heurck, to correction-adjust- 

 ments with such objectives. See also supra, p. 551.] 



Bot. CentralbL, X. (1882) pp. 222-5. 

 Edmonds, J. — See Wenham, infra. 



Engelmann, T. W. — Appareil Microspectral (Microspectroscopic Apparatus). 

 [For experiments on the disengagement of oxygen by vegetable cells, post.~\ 

 Rev. Internat. Sci. Biol., IX. (1882) pp. 465-7. 

 Falkinbtjbg, W. S. — Hints to Amateur Microscopists. 



[How to make a bull's-eye condenser from an old-fashioned bull's-eye 

 watch-glass filled with glycerine and closed with plate glass.] 



Amer. Mon. Micr. Journ., III. (1882) p. 92. 

 F.E.M.S. and " Another F.R.M.S."— See "Wenham, infra. 

 Goltzsch, H. — Binoculares Mikroskop (Binocular Microscope). \_Post.~] 



Zeitschr. f. Instrumentenk., II. (1882) pp. 225-6 (1 fig.), 

 from CarVs Repertorium fur Experimental-physik, xviii. (1882) pp. 27-32. 

 Gutllemaee, — . — See Lutz, E. 



GmiDLACH, E. — Oblique Illumination, with a special consideration of the 

 capabilities of Immersion Condensers, and a note on Symmetrical Illumination. 

 [Post] 



Amer. Mon. Micr. Journ., III. (1882) pp. 85-8 (1 fig.). 



Hall, L. B. — An Eye-protector for use with the Monocular Microscope. 

 [Posf] 



The Microscope, II. (1882) pp. 88-90, from Medical and Surgical Reports. 



Hetjeck, H. Van. — The Electric Light applied to Microscopical Research. 

 [Transl. of paper, ante, p. 418.] 



North. Microscopist, II. (1882) pp. 141-7 (1 fig.). 

 See also Rev. Mycologique (1882) p. 199. 

 HiCKisr, — .—Microscopic Tank. 



[Inquiry how to make a small tank for microscopic use (10 X 8 X 2), 



opaque ends and bottom.] 

 [Reply by J. A. Ollard — " crystallized dishes of about 7 inches diameter."] 



Sci.-Gossip, 1882, pp. 142 and 160. 

 Hilgendoef, F. — Apparat fiir mikroskopische geometrische Zeichnungen. 

 (Apparatus for Microscopical Geometrical Drawings.) 



SB. Gesell. Nat. Fr. Berlin, 1882, pp. 58-60. 



Hitchcock, R. — Numerical Aperture. 



[" A plain statement of what numerical aperture is."] 



Amer. Mon. Micr. Journ., IH. (1882) pp. 95-6. 



„ „ The Microscope Trade. 



[Protest against underselling.] 



Amer. Mon. Micr. Journ., III. (1882) p. 97. 



„ „ Newspaper Science. 



[Quotations of " conglomerations of error and deliberate falsehood " in an 

 article in the Mechanical News on the ' Power of the Microscope.'] 



Amer. Mon. Micr. Journ., III. (1882) p. 98. 



J., T. R.— What is the meaning of the sign x ? 



[Reply to E. Holmes, ante, p. 423, and insisting upon the correctness of 

 his former view. "The idea of amplification alone does not cover 

 the meaning of the sign x as used microscopically .... not algebrai- 

 callv or mechanically."] 



Sci.-Gossip, 1882, p. 159. 

 Kitton, F.— See Deby, J. 



