1885.] NEW YORK ACADEMY OF SCIENCES. 75 



Near Mount Morris Park the local mineralogist finds an inter- 

 esting de})osit of tliis mineral in numerous radiated combinations 

 of acicular crystals. 



Mount Morris is a vast deposit of Garnets, and extensive beds 

 of the same mineral are found in the rocks adjacent. It is to be 

 regretted that perfect crystals are seldom to be found. 



In one locality I have met with Essonife or Cimiamon Stone. 

 Two or three crystals were of considerable size, with a number 

 of good faces. 



The same mineral has been noticed on Tenth avenue, north of 

 Manhattanville, near the site of the Hebrew Orphan Asylum. 



Here also a])peared masses of Apatite, also a few Beryls, of a 

 yellow tint. One mass, of a delicate sea-green hue, known as 

 Aquamarine, f\c\(\Qdi a lapidary two one-carat gems, one of which 

 was recently exhibited before the Academy. 



Daring the past summer, in cutting lOOtli street through 

 from Third to Lexington avenues, a vein of Kyanite was 

 brought to light. Tiie course of the vein is from northeast 

 to southwest, and indications of its presence may be noticed in 

 the streets adjoining. The kyanite occurs in considerable quan- 

 tity, perhaps the most extensive deposit ever opened on the 

 island. 



The typical color of this beautiful mineral is Berlin blue, in 

 varying siiades, usually deepest about the centre of the crystal 

 forms or blades. Only a limited portion of the 100th street 

 mineral is of the usual color; the major part is of a green hue, 

 affording handsome cabinet specimens. 



It is no easy matter to detect distinct crystals in the deposit, 

 though occasional approximations are noticeable. The imper- 

 fect crystalline structure gives the masses a bladed aspect, 

 characteristic of the same mineral at many localities. 



The forked character of the bladed masses permits numerous 

 interstices; these, filled with smoky quartz, add greatly to the 

 beauty of the specimens. Occasionally the effect is enhanced by 

 the presence of garnets of a peculiar light-red color. In two in- 

 stances the garnets formed masses some twenty inches square. 



In near association with the kyanite were the minerals Scapo- 

 lite, Albite, Oligoclase, and Chlorite. 



Some eight years since, I reported the discovery of that inter- 

 esting mineral, the Oxide of Titanium or Eutile in the marble 

 quarries of Morrisania. It is an imi)ortant name in Dana's list 

 of minerals obtained in the Kmgsbridge quarries, which were 

 long since abandoned by workmen. 



I had succeeded in finding that mineral in the gneiss forma- 

 tion on Fifth avenue near the 105th street entrance to Central 

 Park. During the past summer, specimens have been secured 



