19-1 PROCEEDINGS OF THE ACADEMY OF [1892. 



with a few small crystals. Leidyite, a hydrous silicate of iron, is 

 found ill grauular masses. I have noticed a similar occurrence at 

 Jones' Falls, Baltimore. I allude to the presence of chabazite 

 coated with leidyite and leidyite pseudomorph after chabazite, mak- 

 ing haydenite. In Deshong's quarry, in connection with the leidy- 

 ite, are the same zeolites as at Jones' Falls, viz. : stilbite, heuland- 

 ite and a few small specimens of beaumontite. In this pocket some 

 small but good crystals of chalybite occurred. Ward's quarry, 

 about one mile above Deshong's, between the Philadelphia Pike and 

 the Delaware River, is similar in geological characteristics and is 

 largely wrought for its stone. Stilbite is found in fine, large radia- 

 tions. 



The quarry of Leiper and Lewis, at Avondale, on Crum Creek, 

 affords very fine garnets, some as much as two or three inches in 

 diameter, as well as very brilliant smaller ones, also tourmaline in 

 terminated crystals, but occurring usually in sections of about one 

 inch to one and a half inches in length, a stratum of granular quartz, 

 a quarter inch or less in thickness, breaking the continuity of the 

 crystal. Good crystallized orthoclase and beautiful crystals of adu- 

 laria are found in groups in which ai'e sometimes found small, pale 

 green, or nearly white beryls, well crystallized, with modified ter- 

 minations. A few terminated yellow beryls have also been found- 

 Mr. Rand reports having collected in this quarry, chalcopyrite, 

 malachite, chrysocolla, hyalite of a bright green color, uranochre, 

 uraninite and bismutite, the last three in very small quantity. 

 Miss M. A. Holmes reports pink zoisite or thulite. At Folsom is a 

 small quarry opened for cellar foundation-stone, in which some good 

 garnets were recently found, one in my possession being as large as 

 a man's fist. In a quarry near Leiperville, owned by John 

 Deshong, but not at present worked, owing to the hardness of the 

 stone (a hornblende gneiss) some j^retty garnets, one-half to three- 

 quarters of an inch in diameter, were found in a schistose bed in 

 the gneiss, with also stilbite of a yellow or orange color and in 

 radiations one and one-half to two inches in diameter. 



At Bullen's Lane.on Ridley Creek, a quarry, now owned b3'J:imes 

 Irving but not at present worked, has yielded some very fine crys- 

 tallized orthoclase in modified forms, some very fine garnets from 

 one inch-to one and one-half inches in diameter, crystallized musco- 

 vite in quartz, looking as if subjected to enormous compressing force, 



