1885.] 



MICKOSCOPICAL JOURNAL. 



197 



' At another table a delicate appara- 

 tus was cutting a tumor into slices 

 so thin that sharp eyes were required 

 to see them. The keenest razor is a 

 dull and clumsy edge compared with 

 the blade of the delicate knife that 

 was slicing the tumor, producing 

 specimens to be mounted. 



'A gentleman from Newark, O., 

 liad at one of the tables an apparatus 

 for freezing specimens in order that 

 they may be the rhore readily sliced. 

 He froze a kidney firm as a rock be- 

 fore the eyes of the visitors. Then 

 he took the lower jaw of a mole and 

 ground it down, teeth, flesh, and all, 

 several degrees thinner than the most 

 delicate tissue paper. Not a tooth 

 fell out of place in the operation. 



'Professor Walmsley, of Philadel- 

 phia, well known to all microscopists, 

 exhibited an apparatus for taking the 

 photograph of anything, from a dia- 

 tom to a bug. A little insect smaller 

 than the period at the end of the pre- 

 ceding sentence loomed up when 

 photographed larger than the top of 

 a frying-pan. 



• Nearly all the instruments were 

 illuminated with little brass lamps, 

 but some of the exhibitors were 

 shown specimens by the light of elec- 

 tricity. 



' Dr. James, of St. Louis, with a 

 simple device, was mounting speci- 

 mens rapidly.' 



Dr. A. Y. Moore showed A. fel- 

 lucida resolved by a Gundlach half- 

 inch objective with an auxiliary lens 

 attached in front (as first done by 

 Mr. Wenham), which converted the 

 objective into an immersion with a 

 power midway between a \- and a ^- 

 inch. Mr. Spencer was present with 

 a new ^U-inch of his own make, and 

 the resolution was tested by that, and 

 decided to be true, the lines being 96 

 to o.ooi of an inch. A photo- 

 graph of this valve is to be made for 

 the purpose of accurately counting 

 the striaj. 



The exhibit of photo-micrographs 

 by Mr. Vorce was one of the finest 

 and largest ever seen. There were 



about 350 prints from fourteen differ- 

 ent workers. 



Among other interesting demon- 

 strations at the working session may 

 be mentioned the following : — 



The use of the micro-spectro- 

 scope and its application to original 

 research, by Lee H. Smith. 



The use of the polariscope in orig- 

 inal research, by J. D. Hyatt. 



Photography and its applications 

 as an aid to research. Photo-microg- 

 raphy by lamplight, by William H. 

 W&lmsley. Gelatino-bromide en- 

 largement by lamplight, and photo- 

 micrography by sunlight, by Robert 

 Dayton. 



Micrometry. Expositions of meth- 

 ods, by George E. Fell, M. D. 



Staining tissues in mass, simple 

 and compound stainings, by A. H. 

 Tuttle. 



Staining sections, simple and com- 

 pound stainings, animal sections, by 

 L. M. Eastman. 



Practical demonstration of the re- 

 lation of aperture to power in micro- 

 scope objectives, by Allen Y. Moore. 



Special methods of cell making, 

 cementing, etc., by Rev. T. J. 

 Brownell. 



The preparation and application 

 of cements, formulas, etc., by Frank 

 L. James. 



In the evening the soiree was held, 

 which is thus described by the Plain 

 Dealer : — ' It was a unique entertain- 

 ment and attracted over fifteen hun- 

 dred persons, including ladies and 

 gentlemen of prominence. A more 

 satisfactory place for holding the 

 soiree could not have been selected. 

 The success of preparing the aflair 

 largely depended on the exertions of 

 the following soiree committee : — 

 Chairman, CM. Vorce ; R. Dayton, 

 M. D. ; F. O. Nodine, M. D. ; A. 

 Y. Moore, M. D. ; J. R. Owens, M. 

 D. ; M. Rodgers ; John Sawyer. 



'As usual at such gatherings cer- 

 tain tables were centres of intense in- 

 terest. The crowds around these tjibles 

 were so great tliat it was with diffi- 

 culty that one could get near them. 



