Kraus — Occurrence of Celestite near Syracuse, JV. T. 39 



acter of celestite, and that by the action of the agencies, men- 

 tioned above, the same was dissolved, leaving nothing but 

 the so-called cells to show its former presence. I do not 

 believe that the salt found in the rock in the shaft at 

 Livonia, N. Y., is the original occupant of the cavities, but 

 rather that it is of secondary formation, having been derived 

 from the rocks above, which Luther says contain many mud 

 casts at this locality. When the salt is leached from this rock, 

 many of the resulting cavities show the characteristic outline 

 of the celestite crystals and also possess that weathered appear- 

 ance which is so peculiar to the cavities of the " Vermiculars." 



During the coming summer I intend to continue my study 

 of the distribution of the celestite-bearing limestones, and also 

 the brines of the state as to the amount of strontium they con- 

 tain. I will report as soon as possible. 



In conclusion, 1 wish to thank my colleague, Mr. C. L. 

 Hewitt, for the very valuable services he rendered in making 

 possible the excellent illustrations which accompany this paper. 



Syracuse High School, March, 1904. 



