492 PROCEEDINGS OF THE SOCIETY. 



ing tliG oil, having capillary holes in a ring round the front lens, so 

 that by screwing it up or down the oil would be forced out or drawn 

 back again. 



Mr. Crisp said that he should have stated at the meeting of 

 12th March last that the immersion illuminator, consisting of a 

 hemispherical lens with movable setting (see p. 223), was the design 

 of Mr. J. Mayall, jun., and was specially applicable to the Ross- 

 Zentmayer stand. 



Mr. "Watson exhibited Mr. Frank Eutley's petrological Microscope 

 (see p. 471), and the exhibition of Mr. J. M. Rogers' electrical 

 mounting-table was, at his request, postponed until the next meeting, 

 in consequence of his absence from England (see p. 469). 



The President reminded the Meeting of the Scientific Evening on 

 the 21st inst., and said that if any Fellows wished to measure the 

 aperture of their objectives by Abbe's apertometer, Mr, Mayall would 

 have the ajiparatus at the meeting, and be prepared to do so. 



The following were exhibited :— 



Mr. A. C. Cole : — 2 sections of lung of a Sheffield saw-grinder 

 who died from the effects of his work, the lung being the typical 

 specimen on which the late Dr. J. C. Hall founded his successful 

 agitation for improved workshops. 



Mr. Dreyfus: — Memhranipora memhranacea (Polyzoon). 



Mr. C. Hue : — Parabolic illuminator and super-stage (see p. 473). 



Dr. J. B. Treadwell : — 15 photographs of blood-corpuscles. 



Mr. F. H. Ward : — Section of leaf of misteltoe, stained. 



Mr. Watson: — Eutley's Petrological Microscope (see p. 471). 



Mr. Crisp : — (1) Various microtomes : (a) the Rivet microtome 

 (in wood) ; {h) Schiefterdecker's microtome (' Q. Journ. Micr. Sci.,' 

 vol. xvii. 1877, p. 35) ; (c) Walmsley's adai)tation of Bevan Lewis's 

 ether-spray microtome ; (d) Army Medical Museum (U.S.) pattern 

 microtome. (2) Spawn of perch, showing embryo and peculiar 

 radial pin-shaped stride in the albumen (from Mr. Bolton). (3) 

 Melicerta tuhlcolarla (Hudson) (31. Troy), described by Dr. Hudson 

 in ' M. M. J.,' November, 1875, which Mr. Bolton had now found 

 again in another locality. 



New Fellows :— The following were elected FeUoivs : — Messrs. J, 

 F. Hepburn, A. R. Kirby, W. R. Makins, F. Oxley, and J. H. 

 Puleston, M.P. 



Walter W. Reeves, 



Assist.-Secretary. 



