6 TRANSACTIONS OF THE [oct. 3, 
Remarks were offered by Mr. W. E. H1IppeEn. 
Mr. Wu. Ear HIDDEN made a formal announcement of the 
discovery by himself of a new twinning law in the crystals of 
the mineral Zircon. He stated that it had been his privilege 
to announce, in 1881 (Am. Jour. Sct., xxi., 507), the first twins 
of zircons known, and to describe the law of their twinning 
(= 1-i), and that chance had thrown in his way yet another ex- 
ample of a second twinning belonging to this species. The new 
forms came from near Green River, Henderson Co., N. C., and 
exhibit twinning parallel to the pyramid 2 (2-2-1) of the first 
order. Careful measurements gave a very close approximation 
to the required angle for this new geniculation, close enough 
to insure the two specimens thus far discovered to be more than 
accidental formations. ‘The prisms are perfectly parallel and 
the pyramids lie in the same zone of reflection. As associated 
minerals there were identified Epidote, Quartz, Allanite, a hy- 
drated Titanite (Xanthitane) and Vermiculite. Mr. Hidden re- 
marked that the near future would witness the mining of zircons 
by the ton, and the application of zirconia and zirconium com- 
pounds to the purpose of incandescent illumination under the 
Welsbach patent. A diagram of the manner of twinning was. 
put on the blackboard by Mr. Hidden. 
Mr. Greorce F. Kunz stated that, in the last number of the 
Mineralogical Magazine, Professor Lazarus Fletcher had an- 
nounced the very interesting fact that he had obtained cubes of 
a new distinct form of graphite, which he had named Cliftonite,. 
and which had a hardness of 2.06, was cubic in form, with 
modifications of the tetrahexahedron. This is of especial interest 
from the fact that this form is peculiar to the diamond, and it 
suggests that perhaps the carbon in the Dunegan meteorite, 
from which he obtained it, may perhaps have been in a condition 
when it could have formed the diamond, but instead, this new 
form of carbon was produced. 
