41 8 EDITORIAL 



at least, there was nothing except the kindest of feelings towards 

 him. Everyone who has worked in the field to any extent 

 amongst the older basaltic rocks, ought to know that specimens 

 of Zirkelite can be collected by the thousands, and that the 

 rock is no more "indefinitely decomposed and ill defined" than 

 are the great majority of the rocks designated by specific names, 

 and that it is more common than many of them. 



If my fellow-workers will give the name decent treatment, 

 the rock will perpetuate the great name of Zirkel when his work 

 and that of all of us shall have been nearly or quite forgotten in 

 the bright light of future progress. I ask you, as gentlemen, to 

 give my absolute and unqualified denial of the truth of your 

 associate's statement just as wide and public a circulation as you 

 have given to his outrageous and unjustifiable libel. 

 Very respectfully yours, 



M. E. Wadsworth. 



Michigan College of Mines, 



Houghton, Mich., June 14, 1897. 



* * 



An error was introduced in the scale of the map facing p. 



250 of the last number of this Journal in the photographic 



reduction for which the author was not at all responsible. The 



scale should have read : Horizontal, I inch = 3 miles. Vertical, 



1 inch = 3000 feet. 



