100 PROCEEDIXGS OF THE ANN ARBOR MEETING 



ATTEMPT TO STUDY THE ACTUAL CAPILLARY RELATIONSHIPS OF OIL 



AND WATER 



BY CHARr^S W. COOK 



(Ahstract) 



The theories concerniug the importance of capillarity in causing the accu- 

 mulation of petroleum have been based largely upon theoretical grounds and 

 to a lesser extent upon experimental evidence. The experiments have been of 

 such a nature that conclusions had to be drawn from what might be called the 

 end results rather than from direct observation of the action. This paper 

 describes the apparatus emploj-ed and the results obtained in an attempt to 

 observe the actual relationships of oil and water while in contact and during 

 migration. 



Presented in joint session with the Society of Economic Geologists. 



CHEMICAL SUGGESTIONS CONCERNING THE ORIGIN OF LAKE SUPERIOR 



COPPER ORES 



BY ROGER. C. WELLS 



{ Abstract) 



A number of geologists believe that the copper in the conglomerate and 

 amygdaloid lodes came to its present position in solutions which ascended 

 from depth. The chemical possibilities which would accord with this view 

 and known facts in this region are considered with special reference to the 

 solution of copper and copper compounds by agents which might exist at 

 depth and its deposition by agents which can be assumed to have been present 

 nearer the surface. 



Presented in joint session with the Society of Economic Geologists. 



SOLVENTS AND PRECIPITANTS IN THE MICHIGAN COPPER LODES 



BY ALFRED C. LANE 



(Ahstract) 



The paper discusses in some detail the relative importance of chlorides, 

 carbonates, sulphates, and sulphides in solution, and the precipitation of the 

 copper therefrom by ferrous salts, augite, magnetite, etcetera, or ferric salts, 

 such as hematite and limonite, or hydrocarbons, and trap considered as an 

 alkaline reducing agent. 



Presented in joint session with the Society of Economic Geologists. 



