Wadsworth.] 986 [October 1, 
isomorphous with pyroxene. The last four minerals occur only in 
small quantities. The massive parts of the mineral are mixed with 
and incrust the magnetite, while the octahedrons are crystallized in 
and impress the crystals of quartz, indicating their prior formation. 
A very peculiar rock is found at the mine, of but limited extent 
however, composed of a triclinic feldspar and rhodonite, with a little 
galenite as accessory. 
On account of the small quantity of the pure mineral at my dis- 
posal, some of the foregoing observations may prove erroneous.? 
PICROLITE FROM A SERPENTINE QUARRY IN FLoripA, Mass. 
By M. E. Wapsworts, Ph.D. 
Through the courtesy of A. S. Wait, Esq., of Newport, N. H., a 
gentleman much interested in mineralogy, I received a specimen of a 
mineral labelled Asbestus, from Florida, Mass., but which I took 
from its general appearance to be picrosmine. 
It gives the reaction for ammonia with turmeric paper, and in splin- 
ers blackens, burns white, becomes harder, and does not fuse except 
when the splinters are very fine. Chemical analysis shows it to be 
picrolite, and other specimens from the same locality which I have 
since received from Mr. Wait are evidently picrolite and chrysotile. 
The specific gravity (mean of three determinations), is 2.60. 
The result of the analysis made by Mr. Melville caused me to 
partially examine the specimens labelled Picrosmine in the Har- 
vard College Cabinet. The specimens are from the following local- 
ities: 
(1) Firn in Windischmatrei. 
(2) Kalserthal in Windischmatrei. 
(3) Pfitsch. 
(4) Pregratten. 
(5) Pregratten. 
(6) Locality unknown. 
(7) Zoblitz, Saxony. 
1 Since the above was written some analyses were made by Professor Cooke and 
Mr. Melville which showed that the mineral is a danalite, and, if I am not mis- 
taken, that the zinc and manganese are in inverse proportions to those which they 
have in the Rockport danalite. <A description of the occurrence of the Bartlett 
ron ore, written by Mr. Huntington in 1876, is given further on. 
