140 TKANSACTIONS OF THE [aPR. 21, 



many years of close and careful study, during which time he 

 has visited localities where the yellow fever seems to be indige- 

 nous, and has had exceptional opportunities of studying the 

 course of the disease. 



An unanimous vote of thanks was tendered Dr. Sternberg 

 for his interesting and highly instructive lecture. 



April 21, 1890. 

 Stated Meeting. 

 The President, Dr. Newberry, in the chair. 

 Thirty persons present. 



Prof. D. S. MaiCtin read abstracts from an open letter 

 received from the Pennsylvania Forestry Association, relative 

 to petitioning Congress to pass the necessary legislative act 

 withdrawing unoccupied Government Forest Lands from settle- 

 ment. On motion, the President was empowered to appoint a 

 committee of three to draw up and present, on behalf of the 

 Academy, a suitable petition. The President appointed as 

 such committee Prof. D. S. Martin, P. H. Dudley, Esq., 

 and Judge Addison Brown. 



Prof. Martin invited the members of the Academy of Sci- 

 ences to be present at a meeting of the New York State Forestry 

 Association to be held at the American Museum of Natural 

 History, Saturday, April 26th, 1893. 



President Newberry announced that the present meeting 

 was given over to the Section of Mineralogy and the New 

 York Mineralogical Club. 



The first paper was read by Joseph H. Hunt, M.D., on 



A GROUP of copper PSEUDOMORPHS AFTER CHALCOCITE, AND 

 SILICA AND PREHNITE PSEUDOMORPHS AFTER PECTOLITE, 

 FROM PaTERSON, N. J. 



(Abstract.) 



This group of specimens is from that interesting and pic- 

 turesque region in New Jersey where the Passaic River breaks 



