ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 869 



Mayail, J.. Junr. — The Microscope. (Cantor Lectures.) 



[I., II., III., IV., V. Origin of the Microscope. Modern Microscopes to tlio 



date of the application of achromatism . Achromatic Microscopes.] 

 Journ. Soc. Arts, XXXIV. (1886) pp. 987-97 (12 figs.); 1007-21 (19 figs.); 

 1031-48 (21 figs.); 1055-81 (25 figs.); 1095-1121 (26 figs.). 

 [Moore, A. Y.] — High v. Low Powers. 



[Note as to the relative capacities of a 1/6 in. of 1*35 N.A. and a 1/50 in. of 

 1 • 17 N. A., with editorial comments.] 



The Microscope, VI. (1886) pp. 176-7. 

 Nelson, E. M. — Some remarks on the interpretation of Microscopic Images 

 with high powers. 



[" I will now, if you will allow me, sum up the lessons taught by this 

 resolution. They are five in number: — 



1. There are no such thing3 as markings on the Diatomaceaa. The so- 

 called markings on the Diatomaceaa are the structure of the Diatomaceaa. 

 One might, with equal propriety, call ribs markings on a skeleton. 



2. The complete destruction of the hemispherule, bead, and pearl theory. 



3. The contradiction of the statement ' that you cannot know anything 

 about the structure of the Diatotnaceaa, because all the diffraction spectra 

 are not taken up.' 



4. The great superiority of illumination by an axial cone to that by an 

 oblique pencil. 



5. The solution it affords to the questions — What is focus ? What is adjust- 

 ment?"] 



Journ. Quekett Micr. Club, II. (18S6) pp. 255-9, 283-4, and 286-7. 

 Norton, C. E. — Photo-micrography without a Camera. 



[" In every respect it is equal or superior to the method with the camera, 

 with the possible exception of photography of opaque objects."] 



Amer. Mm. Micr. Journ., VII. (1886) pp. 152-3. 

 P i e r s o l, G. A. — Actinic Contrast in Photo-micrography. 



[Also remarks by J. W. Queen (Micr. Bulletin, III. (1886) p. 32) and R. 



Hitchcock (Amer. Mon. Micr. Journ., VII. (18S6) pp. 155-6). Supra, p. 865.| 



Amer. Mon. Micr. Journ., VII. (1886) pp. 121-3. 



Poulsen, V. A. — Elektrik Lys anvendt paa Micmseopet saint en Beskrivelse af 



en af Instrumentmager L. Nyrop construeret Lampe. 



[Small Edison lamp fixed beneath the stage and having a polished metal 

 funnel reflector.] Hosp. Tid., III. (1SS5) p. 81. 



Queen, J. W. — New Acme Lamp for Microscopic use. [Post.'] 



Micr. Bull. (Queen's), III. (1886) p. 27 (1 fig.). 

 [Queen, J. W.] — Prodigious Effulgence. 



[" A series of leading articles by Dr. Royston-Pigott, entitled ' Micro- 

 scopical Advances,' is running in the ' English Mechanic' What great 

 scientific value the editor has discovered in these nightmare-generating 

 ecstasies we fail to conjecture."] 



Micr. Bull. (Queen's), III. (1886) p. 27. 

 „ ,, Parfocal Eye-pieces. [Post.] Ibid, p. 31. 



Roller, C. — Die mikroskopische Untersuchung des Schweinefleisches auf 

 Trichinen und Finnen. (The microscopical examination of pork lor trichinae 

 and measles.) 



[Chaps. 3-6, pp. 12-7 on the Microscope.] 



2nd ed., 34 pp. and 6 pis. (8vo, Trier, 1886). 

 S a ii li, H. — Ueber einen automatischen Regulator fur Brutbfen mit Petroleum- 

 heizung. (On an automatic regulator for incubators with petroleum heating 

 apparatus.) [Post.'] 



Zeitschr. f. Wiss. Mikr., III. (1886) pp. 165-73 (3 figs.). 

 Schott, O. — See Abbe, E. 



Shanks, S. G. — Measuring Blood-corpuscles. 



[Reply to Dr. Swell's criticism, ante, p. 696,] 



Amer. Mon. Micr. Journ., VII. (1886) pp. 138-9. 



