184 TRANSACTIONS OF THE [APR. 16, 
of the six angles, another large crystal having grown on in such 
a way as to prevent it on the sixth. This crystal hassomething 
of the same shape, however. Whether this is a sort of skeleton 
growth, with the intervening spaces not yet filled out, or a case 
of twining, is not quite clear. The former idea is rendered pro- 
bable from the fact that these spaces are partially filled up by a 
large number of small crystals, all of which have their faces 
parallel with the corresponding faces of the large central crystal. 
The other specimen is a doubly terminated crystal of quartz 
of the ordinary shape, but interesting from the fact that one 
termination is more or less coated with a layer of native copper. 
As faras I know, this is the first occurrence noted of native 
copper from the state of New York. It is not at all strange 
that it should occur at Ellenville, for a considerable amount of 
chalcopyrite has been found there, at times in very large and 
beautiful crystals, affording some of the finest known specimens 
of this mineral. 
Another very interesting specimen from the same locality to 
be seen in the’ Rutgers collection, but too large to be easily 
tiken away for exhibition, is a slab covered with quartz crystals 
upon which are implanted more than fifty crystals of brookite 
of the tabular form and red color so well known as occurring 
there. 
These three specimens have been considered unique enough 
to deserve mention and description here. 
RutTGeRS COLLEGE, April 14, 1894. 
The papers were discussed by Profs. Moses, Whitfield and 
Kemp. 
2. A. J. Moses, Mineralogical Notes. Prof. Moses gave as the 
results of recent measurements made on some crystals of zinc- 
ite, from Franklin Furnace, and stated that, referred to Rinne’s 
crystal of artificial oxide of zinc, the natural crystals are either 
5 7 3 
’P.or ? P. 
Dr. Moses mentioned Atacamite from Globe Arizona, and ex- 
hibited the crystals, which are of unusual excellence. The notes 
concluded with a reference to the curious cavities in quartz and 
chaleedony, apparently left by definite monoclinic crystals, 
which are found at McDowell Quarry, Upper Montclair, N. J. 
The angles are very constant and are near those of orthoclase, 
