Wadsworth.) 284 , [October a8 
been sent him that were feeding on hyacinths. To prevent 
the ravages done plum trees by Phytoscopus clitellarius, 
Dr. Hagen advised the use of printers’ ink, applied as im 
the case of canker worms. 
Mr. Henry Edwards spoke of variations observed in Chry- 
sophanus americanus; some specimens have the spots suf 
fused, forming a band, and in others all trace of spots are 
obliterated. 
General Meeting. October 1, 1879. 
The President, Mr. T. T. Bouvé, in the chair. Twenty- 
two persons present. 
The following papers were read: 
DANALITE FROM THE [IRON Mine, BARTLETT, New HAmpsuirReE.} 
By M. E. Wapswortn, Pu.D. 
Through the kindness of Mr. J. H. Huntington, of the New 
Hampshire Geological Survey, specimens of an unknown mineral 
from the Bartlett Iron Mine were placed in my hands for determi- 
nation. rom the following characteristics it is considered to be a 
variety of Danalite. 
Crystalline form, isometric, in octahedrons which are frequently 
elongated in the direction of one of the rhombic axes. Angle i<1, 
109° 30’, obtained by the application goniometer. The best measure- 
ments by the reflecting goniometer, gave the angle, 109 °40’, but 
the faces were so irregular that no accurate measurement could be 
made with this instrument. A thin section ground parallel to an 
octahedral face, and examined under the microscope, shows that the 
mineral is isometric, and contains minute fissures filled with a doubly 
refracting material. ‘The mineral also occurs massive with implanted 
crystals. 
Cleavage, none. Hardness, 5.5-6. 
1 This paper was written in 1875, and the following one, on Picrolite, in the 
spring of 1876, and placed in the hands of Professor J. P. Cooke, Jr. Through 
inadvertence, they were neither published nor returned to the writer until the 
past summer. This explanation is due to myself, and as I have not been able to get 
at my specimens for over two years no re-examination has been made. 
