146 TITLES OF PAPERS 



17. RGAD MATERIALS IXTESTIGATIOX IX WISCOXSIX 

 BY E. F. BEAN 



Discussed by W. A. Nelson. 



IS. SUGGESTED EXPLAXATIOX OF THE HIGH FERRIC IROX COXTEXT OF 



LIMESTOXE COXTACT ZOXES 



BY B. S. BUTLER 



19. J.y EFFECT OF CLIMATIC CHAXGE OX THE SUPERFICIAL ALTERATIOX OF 



ORE DEPOSITS 



BY HEXRY H. KNOX 



Read by title. 



20. TITAXIFEROUS IROX ORES OF WESTERX XORTH CAROLIXA 



BY W. S. BAYLEY 



Discussed by H. S. AYashington. 



21. PRIMARY CHALCOCITE. BRISTOL COPPER MIXE, COXXECTICUT 



BY ALAX M. BATE MAX 



Discussed by Messrs. Lewis and Graton. 



22. A SOURCE OF PRESSURE FOR ORE FORMATION 

 BY L. C. GRATOX 



Discussed by Messrs. Lawson, Bowen, Wright, Larsen, and Si^urr. 



23. MAGXETITE PEGMATITES IX XORTHERX MIXXESOTA 

 BY FRAXK F. GROUT 



Discussed by Messrs. Miller, AYright, Lane, and Lawson. 



24. LADDER TEIXS IX MIXXE80TA 

 BY FRAXK F. GROUT 



Discussed by Messrs. Miller, Wright, Lane, and Lawson. 



25. ROCK ALTERATION IN CONTACT WITH SULPHIDES AT SUDBURY, 



ONTARIO 



BY ALFRED WAXDKK AXI) ROI?EUT ITOFFMAX ^ 



• Introduced by L. C. Graton. 



