1883. 89 Trans. N, Y. Ac. Set. 



what paler than the ideal tint, are all which my cabinet contains to re- 

 present this noted mineral in this locality, 



Calcite. — Many of the calcite specimens are peculiar to the locality. 



The prevailing form is the scalenohedron, with a great variety of 

 changes, sometimes carried to such an extent as to present rounded sur- 

 faces of great beauty. Compound groups and twinned crystals are un- 

 usually numerous. Forms highly modified are symmetrically associated 

 with others equally interesting — varying in color as well as in shape. 



Natrolite. — Seldom has this highly prized mineral appeared in 

 greater abundance than at Weehawken. Between Shafts Nos. i and 2, 

 large spaces of rock were coated with the mineral. The workmen gave 

 glowing accounts of a blast, which released a block of stone "as large 

 as a cooking-stove," one surface of which was white with natrolite — 

 in some places finely rosetted. The stone was broken into sections 

 and fragments, and carried away for disposal to collectors. One of the 

 most interesting of these specimens is about eight inches square, 

 supporting some twenty rosettes in fine condition. Incrustations of 

 interlaced crystals, resembling cocoanut candy, several inches square 

 and of a snowy whiteness, are among the specimens offered on this 

 occasion. At other times, the acicular variety appeared in consid- 

 erable quantity. An outburst of flowing water unfortunately injured 

 a mass of the most promising material. Specimens from other cavi- 

 ties resemble snow-white plush. Aggregations of a globular form are 

 among the most charming trophies the tunnel has yielded, especially 

 when mounted on a surface of cream-colored stilbite. 



Apophyllite. — Weehawken claims the honor of affording the first 

 discovered pink apophyllite in the United States. The crystalline 

 forms are generally simple. In size, some are an inch in length. In a 

 few cases crystals are finely striated, the terminations vanishing into 

 smaller crystals — a profusion of which cover the surface of the gangue. 

 Interesting also are cases where opaque pinkish crystals present trans- 

 parent terminations. Some few choice crystals of the usual color 

 appeared, among them the glassy variety. In a drusy form, the min- 

 eral was quite as plentiful as datolite proved to be, in the tunnels back 

 of Hoboken. 



Amethyst. — Of interest to a local collector are the fragments of a 

 lavender-colored amethyst, associated with the pink apophyllite of 

 Shaft No. I. 



Stilbite. — The stilbite found varies in tint, from a snow-white to 

 cream color and light brown. 



The only other zeolite to be referred to xsLaumontite, of which there 

 appeared a few unimportant fragments. I have met no trace of chaba- 



