234 PROCEEDINGS OF THE ACADEMY OF 



beautiful method of "Double Staining Vegetable Structures," by 

 which certain portions of a plant may be colored green in situ 

 without dissection, whilst other parts are tinted violet ; b^' Mr. 

 D. S. Holman, on his veiy ingenious " Siphon Life Slide ;" andb}' 

 J. G. Richardson, " On the Supposed Hepatic Structure in the 

 Connecting Band of the Siamese Twins," "On the Value of High 

 Powers in the Diagnosis of Blood Stains," and " On the Perform- 

 ance of Two One-Fiftieth Objectives." 



Most of these communications gave rise to copious discussions 

 among our members, eliciting a variety of opinions in regard to 

 the subject under consideration, and it is to be hoped materially 

 advancing the cause of science, by the establishment of some new 

 and positive facts. The debates, as reported for the columns of 

 the Philadelphia Medical Times., have possessed so much general 

 interest to the Medical profession, that they continue to be warmly 

 welcomed by the editors of that valuable journal. 



The improved method of announcing the date of meeting, with 

 the title, etc., of some communication to be made and discussed, 

 by the employment of the United States Postal cards, has contri- 

 buted largely to the interest of our sittings, and at a decreased 

 expense. 



All of which is respectfully submitted by 



Jos. G. Richardson, Recorder. 



REPORT OF CONSERVATOR OF CONCHOLOGICAL 



SECTION. 



The Conservator of the Conchological Section respectfull}-^ re- 

 ports that the following additions have been made to the Cabinet 

 during the year 1874 : 



Jeanes., Jos. Fourteen species of Terrestrial Mollusks, from 

 Mauritius and Madagascar. 



Smithsonian Institution. Eight species of fresh-water shells 

 from Colorado. 



Lea, Isaac. Anodonta Leonensis, Lea ; A. Ferussaciana, Lea, 

 from Fort Hayes, Kansas, and Ancijlus, from Florida, 



Bransford, Dr. J. F. Several species of Mollusks from Nica- 

 ragua. 



