VIII PEEFAOE. 



by Mr. Eugene Ricksecker. It is to be hoped that Mr. Webster's work will 

 be issued as an independent atlas sheet, in order that its full value may be 

 appreciated. 



Since this report was written the analyses by Prof. F. W. Clarke and 

 J)i-. T. M. Chatard, contained in the following pages, have been published in 

 Bulletin No, 9 of this Survey, to which the reader is referred for additional 

 information in reference to methods of analysis. 



I. C. R. 



