74 



JOURNAL OF THE 



I take pleasure in recording the reriiarkable size and quantity 

 of the cavities enclosed in these crystals. The longest cavity 

 noticed was nearly two and one-half inches long and one quarter 

 of an inch wide. Cavities of one inch were not uncommon, 

 while those of one quarter inch and less were, in truth, without 

 number. 



NATURAL SIZE OF SOME REMARKABLE FLUID INCLUSIONS OBSERVED IN 

 QUARTZ CRYSTALS, FROM NORTH CAROLINA. 



Many of the crystals seemed to be made up almost wljolly of 

 cavities, whose walls were barely thick enough to keep them 

 separated. Many hundred, plainly visible to the unaided eye, 

 could have been counted in a single crystal. 



For some time after these crystals were removed from the 

 pocket no bubbles were noticed in any of the cavities. Some 

 peculiar condition of tlie crystal, or of the atmosphere, then 

 existing, probably prevented their formation. Later the bub- 

 bles appeared in great numbers. A few of the crystals were, as 

 water-bearing crystals, very remarkable in size. One weighed 

 nearly twenty-five pounds, had both ends terminated, was of a 

 dark-brown color, and as beautiful as anv we have seen from 



