144 PROCEEDIXGS OF THE SOCIETY OF ECONOMIC GEOLOGISTS 



1. THE HOMESTAKE ORE BODY 

 BY SIDXEY PAIGE 



Discussed bv ^lessrs. Spiirr. Ennner, Lindgreu, and U. S. Grant. 



2. CRITERIA BY AVHICH TO DETER2IIXE THE DIRECTIOX OF FAULTS 



BY BAILEY WILLIS 



Discussed by Messrs. Spurr, Paige, Hotchkiss, Lindgren. and Kemp. 



3. STRUCTrRAL FEATURES EXHIBITED BY THE QUARTZTTES IX THE LEAD 



REGIOX. SOUTH DAKOTA 



BY J. J. RUXXER 



Discussed by Messrs. Spurr. Paige. Lindgren. and U. S. Grant. 



4. GEOGRAPHIC DISTRIBUTIOX OF ORE DEPOSITS IX AUSTRALIA 



BY E. C. ANDREWS 



Eead by title. 



r». COXCEXTRATIOX AXD CIRCULATIOX OF THE ELEMEXTS FROM THE 

 STAXDPOIXT OF ECOXOMIC GEOLOGY 



PKESIUEXTIAL ADDRESS BY WALDEMAR LIXDGREX 



<:;. XATIVE COPPER DEPOSITS OF MICHIGAX ^ 

 BY L. C. GRATOX 



Discussed by Messrs. Graton. Kemp, Seaman, Leith, Lane (read ex- 

 tract of his report, read extract of Jaggar, and spoke), Lawson, Leith, 

 Grout, Leith, Bateman, Lewis, Butler (in rebuttal). Wells, Hotchkiss, 

 Bayley, Butler, Wright, Bayley, Wright, Lane, and Graton. 



7. SOLTEXTS AXD PRECIPITAXTS OF METALLIC COPPER 

 BY ALFRED C. LAXE " 



Discussions same as number 6. 



S. CHEMICAL SUGGESTIOXS COXCERXIXG THE ORIGIX OF LAKE SUPERIOR 



COPPER ORES 



BY R. C. WELLS ^ 



* Discussions same as number G. 



^ Fresented by courtesy of Geological Department. Calumet and Hecla Mining Company. 

 - Introduced by B. S. Butler. 

 3 Introduced by B. S. Butler. 



