696 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Ewell, M. D. — On Fine Measurements. 



[Criticism of Dr. Shanks' blood measurements, supra, p. 529.] 



Amer. Mm. Mia', .hum., VII. (1886) pp. 119-20. 

 Kxner, S.— Ueber Cylinder, welche optische Bilder entwerfen. (On cylinders 

 which form optical images.) [Post.] 



Arch. f. d. Gesammt. Physiol., XXXVIII. (1886) pp. 274-90 (10 figs.). 

 Earner's liepert. d. Physik, XXII. (1886) pp. 299-313 (10 figs.). 

 Francotte, P. — Description du nouveau Microscope a dissection de Zeiss. 

 (DescriDtion of Zeiss' s new dissecting Microscope.) [Ante, p. 507.] 



Bull. Soc. Belg. Micr., XII. (1886) pp. 79-82 (1 fig.). 

 Giles, G. W. M. — On Marine Collecting with the surface net. 

 [Discs of vulcanite for use with lieberkiihn, supra, p. 681.] 



Sci.-Gossip, 1886, p. 121. 

 Gladstone, J. H. — See Thompson, G. 



Gothard, E. v. — Apparate fur Aufnahmen himmlischer Objecte. (Apparatus 

 for photographs of celestial objects.) 



[Describes the application of a Microscope to a telescopic camera for 

 focusing.] 



Zeitschr.f. InstrumentenL, VI. (1886) pp. 5-14 (10 figs.). 

 Harrington, M. W. — The Microscope and the Telescope. 



[Reply to the question what is the difference between them.] 



The Microscope, VI. (1886) pp. 106-7. 

 Henocque. — Appareils destines a l'examen du sang. (Apparatus for the ex- 

 amination of the blood.) 



[The apparatus (resembling Donne's laetoscope and Hermann's hsemato- 

 scope) allows of the examination of undiluted blood, which is placed 

 between two plates of glass which have a triangular prismatic space 

 between them varying from to a third of a millimetre. The advan- 

 tages claimed are that the blood does not require to be diluted, a 

 minimum quantity only of blood is required to be used, and above all, 

 it is not necessary to have recourse to the comparison of different tints. 

 The plates can be applied to any spectroscope, and oxyhsemoglobin, 

 haemoglobin, and methsenioglobin can be successfully studied.] 



Journ. Soc. Scientifiques, I. (1885) p. 24. (Soc. de Biologie 11th Jan.) 

 [Hitchcock, R.] — Microscopical Exhibitions. 



[" It is undoubtedly true that the efforts of any committee to please all 

 the members of a society are fruitless, for there will always be some dis- 

 affected ones. It is impossible to know just what everybody wants, 

 until somebody is assigned to a part that he does not want. Then, when 

 too late to make any changes, the committee learns that such a person will 

 not be present. This is one of the difficulties in arranging a systematic 

 display of this kind. Some persons will not sacrifice personal interests 

 to the wishes of a majority. They seem to think they should be per- 

 mitted to show what will probably give them most notoriety, or attract 

 most general attention to their work. Not being allowed to do that, they 

 stay away entirely."] 



Amer. Man. Micr. Journ., VII. (1886) p. 117. 

 Hoegh, E. v. — Die achromatische Wirkung der Okulare von Ramsden. (The 

 achromatic action of the Ramsden eye-pieces.) 



Central-Ztg.f. Optik u. Mech., VII. (1886) pp. 110-1. 

 Jennings, J. H. — [Photo-micrography, or] how to photograph Microscopic 

 Objects; or lessons in Photo-micrography for beginners. And a chapter on 

 preparing Bacteria, by R. L. Maddox. 



viii. and 128 pp. and 30 figs. (8vo, London, 1886). (Reprinted from 

 the ' Photographic News,' with many additions.) 

 Mayer, A. M. — On the Well-Spherometer ; an instrument that measures the 

 radius of curvature of a lens of any linear aperture. 



Amer. Journ. of Set., XXXII. (1886) pp. 61-9 (7 figs.). 

 Miles, J. L. W. — President's Address [to the Manchester Microscopical Society]. 

 [Deals mainly with illumination.] 



Ann. Report for 1885 (1886) pp. 15-25. 



