1913.] NATURAL SCIENCES OF PHILADELPHIA. 699 



As of special importance may be mentioned: 



Freyer. Beitraege z. Geschichte europ. Schmetterlinge. 3 vols. 

 Freyer. Neuere Beitraege z. Schmetterlingskunde. 7 vols. 

 Millais. British Diving Ducks. 

 Coal Resources of the World, 2 vols., text and folio Atlas. 



A specially illustrated copy of the Centenary volume of the 

 Journal, bound in two volumes, has been presented by the Record- 

 ing Secretary. They contain samples of all the documents and cards 

 used in connection with the centenary celebration, photographs of, 

 and autograph letters from everyone taking part in the meetings or 

 contributing communications to the volume, a photograph of the 

 dining hall with seated guests, lists of subscribers to the general 

 expense fund and to the dinner fund, proof and plates of an omitted 

 paper, statistics of distribution, text of the secretarj^'s unpublished 

 "Reminiscences," and a copy of the printers' bill. These volumes 

 cannot fail to be of increasing interest as the years go on. They 

 have been presented on condition that they be kept under lock and 

 key and inspected only in the presence of an officer of the Academy 

 or an attache of the library. 



Five hundred and eight volumes have been bound. 



The stack has been thoroughly cleaned and the windows so pro- 

 tected as to minimize the access of dust. 



We are indebted to Miss A. L. Fries for a collection of one hundred 

 and thirty-one letters addressed by American and foreign naturalists 

 to the Rev. David Lewis De Schweinitz with his certificates of 

 membership in the Academy and the Linnean Society of Paris. 

 The letters mostly relate to the work of Dr. De Schweinitz on the 

 fungi. 



In compliance with the law, 199 duplicate pamphlets and 58 maps 

 have been returned to the U. S. Department of Agriculture. 



A proposition to alter the by-laws so as to permit of the loaning 

 of books, which had been long under consideration by the Council, 

 was reported on negatively. 



It gives me pleasure to again acknowledge my indebtedness to my 

 assistants, William J. Fox and Furman Shepherd Wilde, for the 

 conscientious and intelligent discharge of their duties. 



Edward J. Nolan, 



Libranan. 



REPORT OF THE CURATORS. 



During the past year the work of the museum staff has been 

 mainly devoted to completing and improving the arrangement of 



