ZOOLOGY AND BOTANY, MICKOSOOPY^ ETC. 145 



D., E. T. — Drawing from the Microscope. 



[Points out the error of B. Hobson's suggestion — Vol. III. (1883) p. 725 — ■ 

 of a semi-rotation of the stage to cure the inversion with the neutral tint 

 reflector. Also remarks on the value of the camera lucida : " In micro- 

 scopical work the camera lucida is merely a preliminary adjunct of limited 

 utility in determining proportions; no graphic or perfect drawing is 

 helped by its continued use ; after afiording the barest outlines and positions 

 the instrument becomes an encumbrance, and those who are practised in 

 its employment feel a palpable sense of relief, and breathe again, when 

 it is got rid of, to settle down to the earnest work of direct vision from the 

 Microscope."] 



Sci.-Gossip, 1883, pp. 265-6 (1 fig.). 

 Dean, A. — Microscopical. 



[Description of a "micro-magic lantern" with or without camera lucida.] 



Engl. MecL, XXXVIII. (1884) p. 391 (1 fig.). 

 Detmers, H. J. — Kesolution of Amphipleura by sunlight, mirror-bar central ; with 

 letters from K. B. Tolles and A. Y. Moore. 



The Microscope, III. (1883) pp. 197-201 and p. 221. 

 Dickenson. — Art of photographing microscopic objects. 



[The apparatus consists of (1) an inexpensive magic lantern, illuminated by 

 a triplex petroleum lamp with the ordinary combination of lenses, and an 

 extra tube with a small bull's-eye condenser; (2) a Microscope, placed 

 horizontally, without the eye-piece ; and (3) a frame to hold the glass 

 screen for focusing the image, and to receive the sensitized plate when 

 photographing. The period of exposure is from eighteen seconds to two 

 hours.] 



Note read before Academy of Medicine in Ireland. 

 Engl. Mech., XXXVIII. (1883) p. 279. 

 Sci.-Gossip, 1884, p. 17. 

 Dinner, Microscopists at. 



[Facetious account of a mythical dinner at which " every article of food was 

 carefuUy examined."] 



The Microscope, III. (1883) p. 233. 

 Dippel, L. — Ein verstellbares Zeichenpult. (An adjustable drawing desk.) 



[Reported as from Lab. Hist. College de France, 1883, p. 188, instead of 1879. 

 [See Vol. III. (1883) p. 565.] 



Bot. Centralbl., XVII. (1884) pp. 62-3 (2 figs.). 

 Eye-pieces, Eeport of the Committee on. 

 [Vol. III. (1883) p. 711.] 



Proc. Amer, Soc. Micr., 6th Ann. Meeting, pp. 175-7. 

 Discussion, pp. 238-9. 

 FiscHEE, G. — Ueber einige Versuche zur Hebung der Chromatischeu Aberration 

 dioptrischer Fernrohre. (On some attempts to remove the Chromatic Aberra- 

 tion of dioptric Telescopes.) 



[Contains an abstract of S. Merz's article " Ueber Dispersionsverhaltnisse 

 optischer Glaser " (Vol. II. (1882) p. 565), with additional remarks. Also 

 report of letter from K. W. Zenger on his Endomersion Objectives, ante, 

 Vol. III. (1883) p. 596, and postr^ 



Central-Ztg. f. Optik u. Mech., IV. (1883) pp. 265-7. 

 Gkimm, J. — See Cohen, E. 



Hagee, H. — Le Microscope. Theorie et Application. (The Microscope. Theory 

 and application.) Translated from the 4th German edition with annotations by 

 L. Planchon and L. Hugounenq. Introduction by J. E. Planchon. x. and 

 264 pp., 350 figs. 18mo, Paris, 1884. 

 Hammond, A. — Address on resigning the chair of the Postal Microscopical 

 Society. 



[Account of the notes written by members of the Society on the slides 

 circulated.] 



Jouni, of Microscopii, III. (1884) pp. 7-17. 

 HiLGARD, Prof. — See Micrometer Scale. 



Ser. 2.— Vol. IV. L 



