190 On the Mineralogy of New York Island. 



tre, and dark and light brown colors. In a few instances the 

 globules are flattened into lens-shaped crystals, like those from 

 Traversella, and forming specimens meriting a prominent place 

 in the cabinet. 



Stilbite is not only widely diffused, but is, in many cases, of 

 more than ordinary beauty. Some of the specimens are of a 

 fine red color, but have a brilliant lustre, and present either 

 fasciculated and grouped crystals, or flattened stellated forms 

 of showy appearance. Still more rarely it assumed a plumose 

 form, disposed on gneiss abounding in black mica. It was 

 found at 42d and 50th streets, along the New Haven Railroad 

 track, and at Yorkville. It is often associated with heulandite 

 in small, yellowish-white crystals, and with cJiabasite in rhom- 

 bic, unmodified crystals, of a reddish color resembling acaclio- 

 Xite. Sometimes the chabasite occurs as a crystalline crust not 

 forming distinct crystals. ** 



The stilbite exists doubtless in large quantities a few feet 

 below the grade of the streets in the vicinity of 1st avenue and 

 in other localities, but the other zeolites are found sparingly. 



"We have jphosph ate of lime, both massive (phosphorite) and 

 sometimes in very perfect crystals ; the phosp7write varying 

 from a light to a dark bottle green color, with a vitreous or 

 greasy lustre. The apatite crystals have similar colors with 

 flat terminations, slightly modified, sometimes sub-transparent, 

 usually translucent. While this species is often met with at 

 different localities, it is not found in any considerable quantity, 

 nor in very large masses. A few fine crystals from Kipp's Bay 

 were associated with beautifully crystallized mica, and two or 

 three very perfect and highly polished octohedral crystals of 

 pyrites. 



Some specimens from 38th street were white, transparent, 

 and associated with albite and chlorite, exactly resembling those 

 from Piedmont. 



Very good specimens of molybdenite are scattered through 

 the gneiss rocks, and in the quartz veins at Kipp's Bay and 



