256 



CEMENTS, LIMES, AND PLASTERS. 



New York. The cements of the Rosendale district are the typical 

 American natural cements, with rather high index, and carrying 15 

 to 20 per cent of magnesia. 



TABLE 115. 



ANALYSES OF NATURAL CEMENTS, ROSENDALE DISTRICT, N. Y. 



*See opposite page for references. 



