ZOOLOGY AND BOTANY, MICEOSCOPY, ETC. 143 



Lehmann, O. — Ueber eine vereinfachte Construction des Krystallisations- 

 Mikroskops, (On a simplified construction of the Crystallisation Microscope.) 

 \_Supra, p. 117.] 



Zeitschr. /. Instrumentenk., TV. (1884) pp. 369-76) (4 figs.). 

 Malley, a. 0. — Illumination for a Microscope. IPost.^ 



Engl. Mech., XL. (1884) p. 299. 

 Manchester Microscopical Society, presentation of Microscopes to, by Members. 



Micr. News, IV. (1884) p. 303. 

 Manton, W. p. — Beginnings with the Microscope: a working handbook con- 

 taining simple instructions in the art and method of using the Microscope and 

 preparing objects for examination. 73 pp. 8vo, Boston, 1884. 



Microscope is always ready. 



[" A consideration that greatly recommends the use of the Microscope is 

 the fact that it is never too cold or hot, too dry or wet, too cloudy or bright 

 for work."] 



The Microscope, IV. (1884) p. 279. 

 Holler, J. — C. Eeichert's Neues Praparirmikroskop. 

 [Abstract of note, IV. (1884) p. 613.] 



Zeitschr. f. Instrumentenk., V. (1885) p. SO. 

 Nelson, E. M. — Microscopic. 



[Keply to five questions by " Al. Fard," p. 198.] 



Engl. Mech., XL. (1884) pp. 239-40. 

 „ „ The Diatomescope. Ibid., p. 282. 



„ „ Illumination for the Microscope. IV. \_Post.'] 



Ibid., p. 282 (6 figs.). 



„ „ Beetle's eye as a lens. 



[Directions for seeing the images of objects in beetle's eyes.] Ibid., p. 327, 



„ „ Optical Kecords. 



[" It is a well-known fact that the great strides taken in the improvement 



of the Microscope during the past twenty years have beea in a great 



measure due to diatom maniacs, who by purchasing glasses warranted to 



resolve such and such diatoms, stimulated the makers not only to increase 



the aperture of their lenses, but also to improve the instrument, apparatus, 



and mounting material Believing, as I do, that the literature 



of the resolution of test objects has had a material influence in the 

 improvement of the Microscope, I see no reason why a similar kind of 

 literature should not also prove beneficial to the telescope."] 



Ibid. (1885) pp. 383-4. 

 „ „ The Diatomescope. 



[Challenges the validity of Dr. Van Heurck's statement, supra, p. 129, that 

 it has "answered very well as an oblique condenser," and considers that 

 the result he obtained " is eminently unfavourable to the Diatomescope."] 



Ibid., p. 410 (1 fig.). 

 Obituary. 



[Discontinuance of ' Science Eecord ' and ' Microscopical News.'] 



Micr. Bulletin, I. (1884) p. 49. 

 Osborne, Lobd S. G. — The Diatomescope. 



[Reply to "Akakia," supra, that he found it better practically not to 

 adjust the two lenses in the same axis.] 



Engl. Mech., XL. (1884) p. 299. 

 Osborne's Diatomescope. 



[Cf. Vol. IV. (1884) p. 961.] Sci.-Gossip (1884) p. 276-7. 



P., T.— Beetle's eye. 



[Directions for seeing the images of objects in beetles' eyes.] 



Engl. Mech., XL. (1884) pp. 327-8 (1 fig.). 

 Penny, W. G. — On the correction of colour aberration when lenses are in 

 contact. Engl. Mech., XL. (1885) pp. 474-5, 



Eayleigh, Loed. — Optics, Geometrical. 



[Contains a note on the " resolving power of optical instruments."] 



Ency. Britannica, 9th ed., XVII. (1884) pp. 798-807 (16 figs.). 



