ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 147 



Mansfield, J. M. — Division of labour among microscopists. ^Post.'] 



Proc. Amer. Soc. Micr., 6tli Ann. Meeting, pp. 43-5. 

 Discussion, pp. 231-2. 

 Matthews' (J.) Simple Eevolving Table. 



[Two perfectly flat wooden boards, placed face to face, the upper one turning 

 on a pivot in the centre of the lower. The lower board should have 

 some rubber on its under surface, or some material which will cause it to 

 remain in position on a table while the upper one is caused to revolve.] 



Amer. Mon. Micr. Journ., IV. (1883) p. 238. 

 Micrometer Scale, A, 1882. 



1. History of the National Committee on Micrometry. By K. H. Ward. 



2. Keport of the National Committee on Micrometry, and accompanying 



report of Prof. Hilgard. 



3. A study of the Centimetre marked "A," prepared by the U.S. Bureau 



of Weights and Measures for the Committee on Micrometry. By 

 W. A Rogers. 



4. Rules for the control of the standard Micrometer. 



Proc. Amer. Soc. Micr., 6th Ann. Meeting, pp. 178-200. 

 "Monachus." — Microscopic Test Objects. [^Supra, pp. 140-1.] 



U7igl. Mech., XXXVIII. (1883-4) p. 341 and p. 431 (1 fig.), 

 MoOBE, A. Y. — The Resolution o? Amphipleura pellucida. A reply to Dr. Detmers. 

 The Microscope, III. (1883) pp. 201-4. (See also pp. 200-1.) 

 Nelson, E. M. — Microscopic Test Obiects. \_Sup7x1, pp. 139-40.] 



Eiujl. Mech., XXXVIIL (18S3) p. 324 and p. 386 (3 figs.). 

 „ „ On the relation of Aperture to Power in Microscope Object- 



glasses. \_Post.'] 



Engl. Mech., XXXVIIL (1883) pp. 367-8. 

 NuNN, R. J. — The Mici'oscope in Medical Gynecology. 



[" For clinical microscopy no great depth of learning nor an intimate 

 acquaintance with fine-spun theories is required, but a plain practical 

 knowledge of the names and appearance of a few of the forms which the 

 Microscope reveals. It is not necessary to know what everything seen in 

 the Microscope is ; it is sufiicient to know what it is not. Just as it is 

 not necessary to be an accomplished botanist to distinguish an oak tree 

 from a turnip, or to be a deeply learned naturalist to tell a horse from 

 a goat, so it is unnecessary to be a thorough pathologist to be able to 

 make good use of the Microscope for clinical purposes."] 



Sep. repr. from Trans. Med. Assoc. Georgia, 1883, pp. 8-10. 

 Penny, W. G. — Theory of the Eye-piece. I. The Dispersion of Light. II. Dis- 

 persion of Light. Also criticisms by J. A. C. III. Spherical Aberration. 

 Engl. Mech., XXXVIIL (1883) p. 283 (1 fig.), p. 367 (1 fig.), p. 390 (1 fig.). 

 Pfaff's Mikrogoniometer. . - 



Boffmann^s Bericht u. d. Wiss. App. a, d. Londoner Internat. Ausstell. 1876 (1881) 



pp. 435-6 (1 fig.), p. 738. 

 Planchon, J. E. — See Hager, H. 



PoTJLSEN, V. A. — Botanical Micro-chemistry. Translated with the assistance of 

 the author, and considerably enlarged by W. Trelease. \_Supra^ p. 91.] xviii. 

 and 118 pp., 8vo., Boston 1884, 

 Powell, Hugh, Death of. 



Engl. Mech., XXXVIIL (1883) p. 279, from Times, Nov. 1883 ; 

 Sci.-Gossip, 1884, p. 17 ; Journ. of Science, VI. (1884) p. 51. 

 " Prismatique." — Object-glass working, IX. and X, 



Engl. Mech., XXXVIIL (1883-4) p. 296 (1 fig.), pp. 420-1. 

 Reznek, W. B.— See Vorce, C. M. 



Rogers, W. A.— A critical study of the action of a diamond in ruling lines upon 

 glass. \_Supra, p. 126.] 



Proc. Amer. Soc. Micr., 6th Ann. Meeting, 1883, pp. 149-65. 

 „ „ See Micrometer Scale. 



Stokes, A. C. — A Growing-cell for minute Organisms. [Supra, p. 122.] 



Sci.-Gossip, 1883, pp. 8-9 (1 fig.). 

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