500 PROCEEDINGS OF THE ACADEMY OF [1881. 



by Mr. Jkment and Mr. Vaux are especially worthy of note. A 

 number of undetermined specimens and specimens wrongly labeled 

 have been examined and properl}' placed in the collection. The 

 labels have been written and the specimens arranged as heretofore 

 by Mr. Chas. F. Parker, in his usual careful manner. It is hoped 

 in time to form special collections, illustrating the various external 

 characters of the minerals. 



A very valuable acquisition has been the manuscript catalogue 

 of the rock collection made by the First Geological Survey of 

 Penns3'lvania. This catalogue, consisting of 300 pages, is an exact 

 copy of the original catalogue made by Prof. H. D. Rogers, 

 which is now in the possession of the State Agricultural College 

 at Bellefonte. It was copied under the direction of Prof. J. P. 

 Lesley, who, at mj' request, has now deposited it with the 

 Academy. This catalogue transforms a worthless collection of 

 rocks into a most valuable one. The collection, which was given 

 by Prof. Rogers to the Franklin Institute, and which is now 

 boxed in the cellar of the Academj-, awaiting arrangement, con- 

 sists of 5725 specimens, illustrating the lithology of the greater 

 portion of the State. The specimens are all numbered, and can 

 be so arranged as to correspond with the pages in Prof. Rogers 

 Final Geological Report, and thus to prove of great service to 

 students. It is to be regretted that the limited space now at the 

 command of the Academy precludes any satisfactory display of 

 this collection. 



In accordance with the by-law requesting the Professor to state 

 the needs of tlie depaitment under his charge, the following 

 suggestions are here offered : 



It is very desirable that a single row of drawers should be 

 placed beneath the mineral cases. Specimens of less value than 

 those in the cases, those valuable only for locality, and minerals 

 for the use of students would properly be placed in such drawers. 

 The systematic arrangement and good appearance of the collec- 

 tion would thus be permanently established. It is also recom- 

 mended that some provision be made for the storage of duplicates. 

 A series of wooden trays sliding in a rough frame would be the 

 most compact and suitable arrangement, and could conveniently 

 accommodate not only the duplicate specimens now scattered, but 

 also others that may hereafter be received. 



