514 PROCEEDINGS OF THE ACADEMY OP 



Belisario ; and a collection of bows and arrows, from one of the 

 Pacific Isles, presented by Dr. Wm. H. Jones, U. S. X. 

 Respectfully submitted by 



Joseph Leidy, 

 Chairman of the Curators. 



REPORT OF RECORDER OF BIOLOGICAL AND 

 MICROSCOPICAL SECTION, 1875. 



In presenting to this Section the annual Report of the Recorder, 

 I am gratified to be able to make it a mere record of scientific 

 research actually accomplished ; and believe we have ample cause 

 for mutual felicitation in the fact, that no single meeting through- 

 out the 3 r ear has passed without its written or oral communica- 

 tion, illustrated in every instance save one by specimens of 

 microscopic work. 



At the first meeting in 1875, Dr. J. G. Hunt made a very inter- 

 esting communication upon the subject of Amplifiers for the 

 microscope, giving a history of the apparatus, and demonstrating 

 the mode of employment and special advantages. At the Febru- 

 ary meeting, Dr. J. C. Morris read his elaborate report upon 

 oV and gL objectives, full abstracts of which have been since re- 

 printed in the "Cincinnati Medical News," and in the "London 

 Monthly. Microscopical Journal." In March an instructive article 

 on "The misinterpretation of appearances under the microscope," 

 by Mr. Charles Stodder, of Boston, Mass., a correspondent of 

 the Section, was read and afterwards appeared in the columns 

 of the "Phila. Medical Times." At the next meeting, Dr. Carl 

 Seder produced an important paper on the " Photographic en- 

 largement of microscopic objects," illustrated hy numerous pho- 

 tographs taken with an ingenious camera of his own construction, 

 which he also displayed. In May, an exhaustive article on the 

 "Physiological action of hemlock and its alkaloids," was pre- 

 sented by Dr. H. C. Wood, for B. F. Lautenbach, M.D. ; and Dr. 

 J. G Hunt exhibited some of his exquisite preparations, of in- 

 jected intestinal villi of the rabbit, and Pacinian bodies from the 

 mesentery of the cat, giving minute directions for following his 

 method of manipulation. At the first meeting after the summer 

 vacation, Dr. Hunt showed some sections from the branch of a 

 pear tree affected with "black rot" or "fire blight" which gave 



