OP ARTS AND SCIENCES. 353 



with the same result, namely, of actually cutting the glass completely 

 through. To verify the phenomenon, successive particles were used 

 for the purpose, and with the same result. The experiment was then 

 tried on a topaz, and the same little mineral point was found to scratch 

 topaz almost as readily as it did glass. It was finally applied to a 

 polished sapphire, and readily scratched that also, proving beyond 

 question that this residue of small, white, transparent grains must be 

 diamond, though no well formed crystals could be recognized. 



Dr. Huntington then exhibited in the hollow of a watch- 

 glass the diamonds which he had obtained from the mete- 

 orite. 



Catalogue of the Magnitudes of Southern Stars from 0° 

 to —30° declination, to the Magnitude of 7.0 inclusive. By- 

 Edwin F. Sawyer. 



VOL. XXVII. (n. S. XIX.) 23 



