V,3Co UNITED STATES GEOLOGICAL SURVEY 



CHARLES D. WALCOTT, DIRECTOE 



THE 



CRYSTAL FALLS IRON-BEARING DISTRICT OF MICHIGAN 



BY 



J. MORGAN CLEMENTS and HENEY LLOYD SMYTH 



WITH 



A CHAPTER ON THE STURGEON RIVER TONGUE 



• BT 



WILLIAM SHIRLEY BAYLBY 



AND 



AN INTRODUCTION 



BY • 



CHARLES RICHARD VAN HISE 



/^ £\. 



^^^ 



WASHIK"G-TON 



GOVERNMENT PRINTING OFFICE 



1899 



