REPORT OF DEPARTMENT OP MINERALOGY. 225 



in Survej Bulletin No. ( .>. in these notes I have described a camber 

 of Interesting minerals from various new localities, partly representing 



Museum material and partly the field collections of I be Survey. The 

 most DOtable item in the series, perhaps, is the aecount of peotolite Imm 

 Alaska, which so closely simulates jade as to ha\e been mistaken for 

 tlte latter mineral. The laboratory is now reorganized in the QOrtheasI 

 pavilion, where, with eight associates and laborers, I supervise the 

 chemical and physical work of the Survey. 



In conclusion I must express my indebtedness to my colleague, -Mr. 

 \Y. S. Yeates, upon whom has fallen most of the severer labor of 

 arranging and classifying the mineral eolleetion. Ensigns O. G. Dodge, 

 Ernest Wilkinson and H. S. Knapp, of the U. S. Navy, have also ren- 

 dered valuable assistance, and so, too, has Mr. J. H. Brown. Each of 

 these gentlemen deserves much greater credit than can be fairly given 

 in these uecessarily brief lines. 



S. Mis. 33, pt. 2 15 



