420 



Mr. Miller on Crystals found in Slags. 



In cases where any of the planes are wanting, it will be 

 necessary to complete the series, and to compute the angles 

 between the interpolated planes. 



The results of the comparison are presented in the following 

 Table. 



The computed angles are distinguished by an asterisk. 



W. H. MILLER. 



St. John's College, 

 March 22, 1830. 



