418 PROCEEDINGS OF THE ACADEMY OF [1887. 



70 or 80 well terminated crystals of Antimony Sulphide, with beau- 

 tiful modifications; and several specimens of Azurite and Malachite 

 from Arizona. 



Respectfully submitted, 



Jacob Binder, 



Curator. 



EEPORT OF THE BIOLOGICAL AND MICRO- 

 SCOPICAL SECTION. 



During the year 17 stated meetings were held with an average 

 attendance of 10 members. 



The Annual Exhibition was held Dec. 9th, 1886 with the usual 

 success. 



One member and eight contributors were elected during the year. 



The deaths of Dr. N. A. Randolph and of Paul P. Keller were 

 announced. 



The following are the more important subjects under discussion 

 during the year: 



December 6, 1886. Recent advances in Embryology, by Prof. 

 J. A. Ryder. 



December 6, 1886. Fructification in the Algae, by Dr. L. 

 Brewer Hall. 



January 3, 1887. Observations upon Trichia scabra, by Harold 

 Wingate. 



January 3, 1887. Demonstration of Prof. Ryder's ribbon cutting 

 Microtome. 



January 17, 1887. Observations upon the eggs of the Skate, by 

 Prof. J. A. Ryder. 



February 9, 1887. Upon the best methods of making Cells, by 

 Dr. L. Ashley Faught. 



February 9, 1887. The blastodermic layers in the yolk of different 

 animals, by Prof J. A. Ryder. 



February 21, 1887. The hairs and spines of Onosmodium Vir- 

 giniana and other plants, by Dr. J. B. Brinton. 



February 21, 1887. Experiments with the moth larva in refer- 

 ence to the manner in which they injure wood fibres, by George 

 B. Cock. 



March 7, 1887. Experiments with the moth larva and Cock- 

 roach with referrence to the manner in which they injure wool 

 fibres, by George B. Cock. 



