150 SUMMARY OP CUBRENT RESEARCHES RELATING TO 



Gartnek, G. — Ueber das electrische Microscop, (On the Electric Microscope.) 



[Posf] 



Med. Jahrb. K. E. Gesellsch. Aerzte Wien, 1884, pp. 217-44 (1 pi. and 1 fig.)- 



Med. Times, II. (1885) pp. 412-5 (1 fig.). 



Glazebrook, E. T., and W. N. Shaw. — Practical Physics. 



[" Travelling " Microscope for measurements, pp. 64-6. Microscopes used 

 to measure expansion, pp. 200-1. Measurement of the magnifying power 

 of a lens or of a Microscope, pp. 283-7. Measurement of the Index of 

 Refraction of a plate by means of a Microscope, pp. 303-5 (1 fig-)-] 



xxii. and 487 pp., 80 figs., 8vo, London, 1885. 



Goodwin. — Photo-micrograpliy for Winter Evenings. 



New Fork Phot. Times, XV. (1885) p. 689, 



Grimm, J, — See Birnbaum, K. 

 H., R. O.— [Objectives.] 



[Explanation of F. H. Evans' difficulty, supra, depends on the difference 

 between the optical tube-length and 10 in.] 



Engl. Mech., XLII. (1885) p. 427. 

 Hetjrck, H. van. — Le Microscope a I'Exposition UniverseUe d'Anvers. (The 

 Microscope at the Antwerp Universal Exhibition.) {Contd.) 

 [Microscopes, objectives, &c., of Herr C. Eeichert, supra, p. 129.] 



Journ. de Micrographie, IX. (1885) pp. 496-504 (6 figs.). 



HiTOHCOOK, R. — Photo-micrography. I., II. 



[1. General consideration of photographic methods. 2. Apparatus, (a) 

 Plates. Developing apparatus (trays). Lanterns. Dark room.] 



Amer. Mon. Micr. Journ., VL (1885) pp. 201-3, 224-7 (6 figs.). 



[Hitchcock, R.]— Postal Club Boxes. 



[Contents of Boxes Oy, E, Cx, D, and Cw.] 



Amer. Mon. Micr. Journ., VI. (1885) pp. 217-8. 



„ „ Microscopical Societies. 



[List of thirteen American societies, with brief particulars.] 



Amer. Mon. Micr. Journ., VI. (1885) pp. 237-9. 



„ „ Palmer Slide Co.'s Bevel-edge Slides (and remarks by Mr. 



G. S. Woolman) Amer. Mon. Micr. Journ., VI. (1885) p. 239. 



Holmes, E. — A simple and handy Compound Selenite and Mica Stage. 



[Indicates " how a very useful stage may be made for a few pence, which 

 will answer most, if not all, the purposes of the most expensive appa- 

 ratus." A whole revolution of the films is unnecessary. A lever motion 

 can be made to give all the alterations. Take a film of selenite and one 

 of mica, and mount on circular pieces of wood with projecting handles. 

 Then take five thin slips of wood a little larger than an ordinary slip, 

 and cut circular pieces out of each. Only two of these are just large 

 enough for the films to move in, and the other three, slightly smaller, 

 form top and bottom and centre piece to keep films apart. Glue all these 

 together, with the selenite and mica films in place. When dry, these 

 have a free movement of about 60° or so, and a thin strip at back, to 

 lodge elide against completes it.] 



Ungl. Mech., XLII. (1885) p. 321 (3 figs.). 

 HoMOios. — Objectives. 



[Further as to "objectives h, I'immersion of topaz, diamond, or precious 

 stones of high refractive index."] 



Engl. Mech., XLII.X1886) p. 386. 

 Hopkins, G. M. — Das Mikroskop in den mechanischen Kiinsten. (The Micro- 

 scope in the Mechanical Arts.) IPost.'] 



Central-Ztg. f. Optik u. Mech., VL (1885) pp. 270-2 (10 figs.). 

 Howe, L. — An Imperfection of the Eye and Test-Objects for the Microscope. 



[Supra, p. 147.] The Microscope, V. (1885) pp. 226-228. 



[James, F. L.] — See American Society of Microscopists. 

 Jeaffreson, J, B., Death of. Nature, XXXIII. (1885) p. 278. 



