34 PROCEEDINGS OP THE ACADEMY OP [1889 



Chalcocite. — Several years ago I observed a single specimen of 

 chalcocite in quartz at the Ecton whim shaft near Shannonville, 

 Montgomery Co. 



Aragonite occurs at Sherrer's quarry on the Delaware river road, 

 about a mile above Easton, in beautiful snow-white masses, associated 

 with serpentine ; also in silky fibers. 



Quartz. — Perfect quartz crystals (one of which is 3] inches in 

 length) have been found at the " Court House lot " Easton, and in 

 large grouj)s at Flint Hill, near Bingen, Northampton Co. 



Pyrite from St. Peters, Chester Co. — I have observed the follow- 

 ing forms and planes of pyrite from this well-known locality : 



(H), 3 1, 1, 2-2, i, i-2. 



2 and some combinations as follows: 



1 A i-'2 O A 2 

 OAi-2 OA3l 



(0) H A 1 i (i X 2) 



Melaconite and Malachite have been obtained at Franklintown, 

 Adams Co. 



Apophylllte from St. Peter's. 



One perfect crystal in my possession measures 2 in. [-2 in. The 

 form is O. 1. i-i. Other planes observed are I. i-2. i.-i. O. 1. An 

 analysis made in June afforded me 



Si 2 51-63 



Ca O 25-42 



K 2 O 6-25 



H 2 O 16-58 



99-90 

 Sp. qr. 2.35. 



A complete and revised list of the minerals occurring at this 

 locality is here annexed. * Indicates occurrence in small quantities. 



Stilbite* apophyllite, aragonite, pyroxene (massive and in crystals) 

 pyrite (many forms) chalcopyrite, chrysoeolla* malachite* calcite 

 (and Iceland spar) byssolite* byssolitic calcite, melanite, actolitein 

 magnetite (massive and in crystals) serpentine, crythrite* pyrallo- 

 lite, glauconite, orthoclase (radiated) bornite.* 



New Minerals from Cornwall, Lebanon Co. — I have been able to 



