302 SUMMIRY OF CURRENT RESEARCHES RELATING TO 



Mainland. — Substitute for a Kevolving Table. 



[Higbly lacquered Japauese tray, 20 in. x 12 ia.] 



Journ. Quek. Micr. Clvb, I. (1884) p. 323. 

 Matthews, J. — Eevolving Table. 



\_Ante, p. 147.] Journ. Quek. Micr. Club, I. (1884) p. 319. 



McOalla, a. — The ' ' Congress " Nose-piece. 



[Claims to be the original inventor and not W. H. Bulloch.] 



Amer. Mon. Micr. Journ., V. (1884) pp. 38 -9. 

 „ „ " Give credit to whom credit is due." [Same subject.] 



The Microscope, IV. (1884) pp. 30-3. 

 Mellob, T. K. — Gauss on the Object-glass. 



Engl Mech., XXXIX. (1884) pp. 56-7. 

 Michael, A. D. — Polarization of light by a concave mirror of opal glass, or a 

 piece of white china. Journ. Quek. Micr. Club, 1. (1884) pp. 323-4. 



" Microscopists " and the position of the Microscope. 



[" The statement is often made that the Microscope owes its present approxi- 

 mation to perfection, and microscopical methods their extensive develop- 

 ment, to " microscopists," that term being applied to those who consider 

 the Microscope as an end, not a means, and whose whole use of the 

 instrument is confined to the resolution of test-objects and the study of 

 the marking of diatoms. Nothing is more erroneous. The Microscope is 

 far more in debt to the biologist who uses it as a means to solve some 

 problem. To him we owe all our methods for staining, all our facilities 

 for section-cutting, and every discovery in the use of microchemioal 

 reagents."] 



Science Record, II. (1884) p. 87. 

 " Monachus." — Microscopic Test-Objects. 



[Reply to L. Wright and E. M. Nelson, infra.'] 



Engl. Mech., XXXVIII. (1884) pp. 517 and 560. 



MoOBE, A. Y. — Slide of Amphipleura pellucida mounted in a medium of refractive 



index 2*3. [/w/ra, p. 319.] ^mer. JJfora. ilfzcr. Jowra., V. (1884) p. 37. 



„ „ The Parabola as an Illuminator for Homogeneous- immersion 



Objectives. [Post.'] The Microscope, IV. (1884) pp. 27-30 (1 fig.). 



Nelson, E. M. — Microscopic Test-Objects. 



[Reply to (1) " Monachus," ante, p. 141 — supra, p. 288 ; (2) T. T., ante, p. 148 ; 

 and (3) L. Wright infra.] 



Engl. Mech., XXXVIII. (1884) pp. 516-7 (4 figs.). 

 „ „ Moller's Probe-Platte. 



[Remarks on plates mounted in phosphorus, monobromide, balsam, and dry.] 



Engl. Mech., XXXVIII. (1884) p. 540. 

 „ „ Microscopic Test-Objects. 



[Further in reply to " Monachus."] 



Engl. Mech., XXXVIII. (1884) p. 560 (4 figs.). 

 „ „ On the Selection and Use of Microscopical Apparatus. 



[S^sume of " demonstration " at the Quekett Microscopical Club.] 



Engl. Mech., XXXIX. (1884) p. 48. 

 Ollaed, J. A. — Simple form of Eevolving Table made out of two mincing boards. 

 [Exhibition only.] 



Journ. Quek. Micr. Club, I. (1884) p. 323. 

 Pelletan, J. — Le Microscope " Continental." 



[Warning against imitations !] Journ. de Microgr., VIII. (1884) p. 121. 



Pendlebuky, C. — Lenses and Systems of Lenses, treated after the manner of 



Gauss. 95 pp. and 24 figs. 8vo, Cambridge, 1884. 

 Penny, W. G. — Theory of the Eye-piece. IV. Distortion of Curvature. 



Engl. Mech., XXXVIII. (1884) p. 497 (1 fig.). 



„ „ „ „ V. Summary of Formulse — On Further 



Approximations for the Distortion, and General Remarks — Proposed Eye-piece. 



[" The first lens plano-concave, the second plano-convex, with focal length 



numerically equal to that of the first, and placed at a distance from it 



equal to twice the focal length of the eye-lens, the curved side of each of 



