214 TRANSACTIONS OF THE [MAY 7, 
worked for fully fifty years, and have finally disappeared. Some 
of the more interesting minerals obtained here by early and later 
collectors are galenite, pyrite, kyanite, stilbite, chabazite and 
harmotome. A few specimens of the last-named mineral con- 
tained cruciform crystals, some of which were fully an inch in 
length. 
ie few blocks to the westward, near Second Avenue, between 
Forty-fifth and Forty-sixth Streets, a locality was opened afford- 
ing some of the best zeolites on the Island. Those were rescued 
by the writer from destruction one bright spring morning during 
his first expedition of the season. The str ange prompting which 
led him thither is an experience never to be forgotten. 
The blocks bounded by Sixth and Seventh Avenues, from 
Fifty-fourth Street to Central Park, included an interesting 
region. 
West Fifty-eighth Street, near the Hudson, to about Sixty- 
third Street, is the celebrated serpentine and anthophyllite 
deposit, which is well known to mineralogists the world over. 
Boulders of the rock have been found far distant from the 
locality, some on Fourteenth Street and Third Avenue, at Cor- 
lear’s Hook, and in South Brooklyn. Some years since an attempt 
was made to work up the material for commercial purposes. It 
proved too hard and refractory, and the experimenter was ruined 
financially in his effort. 
The Harlem Tunnelat Ninety-sixth Street and Fourth Avenue 
was a locality of interest to collectors in the early days of 
railroad building. The various zeolites were here quite abun- 
dant. The improvements in 1871-3, including the widening of 
the tunnel, afforded opportunity for additional supplies, not 
only of the zeolites, but of other desirable material. Some of these, 
including the harmotomes discovered by the writer, have found 
their way into many of the chief cabinets of the land. Lately 
the veins appearing at the tunnel have been again opened at One 
Hundredth Street. Parallel veins have proved even more 
prolific, yielding the most abundant supplies of kyanite, tour- 
malines, and garnets ever obtained on the island. Thirty-four 
tourmalines were obtained from a quartz pocket by the writer, 
seventeen of which were terminated. ‘The largest crystal, one 
inch in diameter and five inches in length, with good terminal 
planes, would be a fair companion piece to the fine Haddam 
tourmaline in the collection at Yale College. 
From this point westward to Central Park, one of the most 
elevated sections of the island, the presence of interesting min- 
erals is everywhere apparent. "The focus of interest was struck, 
but only slightly, in grading Fifth Avenue at One Hundred and 
