ZOOLOGY AND BOTANY, MICKOSCOPY, ETC. 695 



The best, however, remains to be told. Mr. Nelson expresses his 

 astonishment that it was not seen that " insistance on the accuracy of 

 Dr. Eichhorn's interpretation stultifies Prof. Abbe's magnificent diffrac- 

 tion theory" Now the problem solved by Dr. Eichhorn was set to 

 him by Prof. Abbe himself ; the solution was printed and published 

 under his auspices ; and it was sent by him to the Society as a re- 

 markable confirmation of the diffraction theory ! As the paper in this 

 Journal from which Mr. Nelson quotes plainly states the part which 

 Prof. Abbe's University took in the matter, the wonder is that no 

 suspicion crossed Mr. Nelson's mind when he was writing as to the 

 error into which he had fallen. It was hardly likely that any Uni- 

 versity would take the pains to make public the work of a student 

 which " stultified the whole of the magnificent theory " of one of their 

 most illustrious professors ! 



Mr. Nelson's mistake has its origin, we fear, in another attempt to 

 throw a stone at the " Eoyal Microscopical Society." We are hardly 

 called upon to repress a feeling of satisfaction that it should have 

 resulted in so notable a miss. 



Allison, F. B. — See Dancer, J. B. 



American Society of Microscopists. — Ninth Annual Meeting. 



[Circulars issued by the President, Secretary, and Director of Working 

 Session.] 



Amer.Mon. Micr. Joum., VII. (18S6) pp. 114 and 119. 

 Micr. Bulletin (Queen's), III. (1886) p. 17. 

 Tlie Microscope, VI. (1886) pp. 124-8. 

 Auckland (N.Z.) Microscopical Society, First Annual Meeting of. 



Joum. of Micr., V. (1886) p. 196. 

 B., L. B. — True cause of dotted appearance in P. formosum. 



Engl. Mech., XLIII. (1886) p. 300-1. 



Bertrand, E. — Nouvelles dispositions du Microscope permettant de mesurer 



l'ecartement des axes optiques et les indices de refraction. (New arrangement 



of the Microscope allowing of the measurement of the separation of the optic 



axes and the indices of refraction.) [Post.] 



Bull. Soc. Mineral, de France, VIII. (1885) p. 377. 



„ „ Sur la Mesure des indices de refraction des elements micros- 



copiques des Roches. (On the measurement of the indices of refraction of the 



microscopic elements of rocks.) \_Post.~] Ibid., p. 426. 



Bleekrode, L. — See Thompson, G. 



Cutter, E. — Cam Fine Adjustment 1 [Post.] 



The Microscope, VI. (1886) pp. 101-4 (1 fig.). 

 Dancer, J. B. — What is the true cause of the dotted appearance on the 

 P. angulatum. [Supra, p. 691.] 



Engl. Mech., XLIII. (1886) p. 283 and 329. 

 See also F. B. Allison, p. 351. 

 Dancer (J. B.), Proposed Annuity for. 



[Statement of his services to science. " He invented microscopic photo- 

 graphs, which so much delighted and astonished us twenty-five or thirty 

 years ago," and brought out excellent Microscopes moderate in price.] 



Nature, XXXIV. (18S6) p. 200. 

 Dieudonne, E. — De l'Electro-megaloscopie. (On electro-megaloscopy.) [Post.'] 

 La Lumiere Electrique, XIX. (1886) pp. 64-7 (3 figs.). 

 Directory, Science. 



[Microscopical and other Societies, contd.] Sci.-Gossip, 1886, p. 138, 



