1879.] 245 [Annual Meeting. 
The minerals are in the same good condition as formerly, 
and the preliminary work necessary for the preparation of a 
catalogue has been begun, and is being actively pressed for- 
ward by Mr. Bouvé. 
The re-arrangement of the Geological Room, and the 
mounting and cataloguing of the specimens is being now 
earried on by Mr. Crosby, assisted by Miss Carter. This 
change has been made necessary by recent advances in 
science, especially in Lithology. The plan of operations also 
embraces the formation of a New England Geological collec- 
tion. 
The work so far has been expended on the Lithological col- 
lection, and has included the formation of a series of about 
one hundred specimens, illustrating the principal minerals 
constituting rocks, and a collection of about eighty speci- 
mens, showing the principal textures of rocks. 
The principal accession in this department for the year con- 
sists of a suite of 250 specimens of the typical rocks of New 
Hampshire, collected by the recent Geological Survey of that 
State, and received in exchange from Prof. C. H. Hitchcock. 
The revision of the Palaeontological collections has been 
finished during the year. The general plan of this depart- 
ment, and the features of special interest and value have been 
described in previous reports. Since the beginning of this 
work, Mr. Crosby has been assisted by Miss Carter and Miss 
Washburn, the former working upon the collections from 
Kurope, Asia, and Africa, and the latter upon those from 
North and South America. 7 
The North American collection was really finished at the 
beginning of the year, but the following accessions have since 
been received, mounted, and labelled : — 
Forty specimens of Cambrian, Silurian, and Devonian fos- 
sils, collected by Prof. F. H. Bradley, and given by Mr. John 
Cummings. 
_ A collection of nearly 500 subcarboniferous crinoids has 
been obtained by exchange from Prof. A. H. Worthen, State 
Geologist of Illinois. 
