Paramorpliic Alteration of Pyroxene. — Gordon. 43 
of alteration irresistible. In some cases areas of compact 
hornblende directly associated with the bordering bajids of 
hornblende and evidently identical with them appear at inter- 
vals within the fractured zone. The hornl)lcnde occurs chiefly 
in that portion of the crystal which has suffered most from 
crushing. Standing alone this Ijjtter fact could not be regard- 
ed as conclusive evidence of alteration since the position of the 
fracture may have been determined by the presence of original 
hornblende intergrown with the augite, but taken in connection 
widi the bands bordering the fracture the whole seems to of- 
fer conclusive evidence of alteration. 
In descriptions of the crystalline schists there is a widely 
prevalent tendency to ascribe all the compact hornblende to 
the paramorphic alteration of augite on what, in view of the 
foregoing, seems to be insufficient data, and sometimes pure 
assumption. Without touching the validity of such views we 
would suggest that there is need of caution here and that the 
cause of petrography will be promoted by distinguishing clear- 
ly between cases that are reasonable inferences only and those 
that can be conclusively established ; while statements based on 
pure assumption .'hould be avoided. 
University of Washington. 
CONTRIBUTIONS TO MINERALOGY. 
By John Everman, Easton, Pa. 
I. Some Zeolites from Moore St.\tion, New Jersey. 
This locality, which is situated a few miles south of Lam- 
bertville along the Delaware river, bids fair to become as 
famous as the historic Bergen tunnel. The opening is operated 
by the Delaware River Quarry Co., and the material quarried 
is used chiefly for road making and ballast. The rock is an 
overflow of plagioclase hornblende and pyroxene. 
Besides the zeolites, stilbite, natrolite, mesolite, and scol- 
ecite. there are pecolite, datolite, apophyllite, prehnite. light 
yellow calcite (scalenochedra common and of fair form up to 
50 mm.) epidote, cuprite, chrysocolla, pyrite malachite and 
opal. 
Stilbite : This is quite abundant and generally in large 
masses of crvstals. Shcaf-liko crystals and globular-radiat- 
