292 AXXALS XEW YORK ACADEMY OF SCIEXCES 



the distribution of these gneissie rocks was not primarily dependent upon 

 fokling and that their petrographic condition was not wholly dne to dy- 

 namic metamorphic processes. He suggests that the original strata which 

 formed the basis of the present complications have been extensively af- 

 fected by igneous intrusions as sills and sheets and by associated influ- 

 ences chiefly in the form of impregnating solutions and magmatic differ- 

 entiates, producing granitization, which runs in zones or beds or more 

 irregular tongues through or into the strata. If this is the key to the 

 origin of the gneisses, it is evident that much of their tongue-like occur- 

 rence and apparent repetition is not due to complicated folding at all, but 

 is essentially a primary structure itself, dependent chiefly on the distri- 

 bution of weaknesses along which the igneous penetration could take 

 place. This, together with folding of a less complicated sort than had 

 formerly been accredited to the Alps, will, therefore, account for the 

 complex conditions found. 



The meeting then adjourned to the Members' room of the Museum^ 

 where refreshments were served and an impromptu reception was held, 

 giving the members and friends of the Section an opportunity to meet 

 Professor Eothpletz and to carry away a delightful memory of his genial 

 personality. 



The Section then adjourned. 



A. B. Pacini, 



Secretary. 



BUSINESS MEETIXCt 

 6 October, 1913 



The business meeting of the Academy was called to order at 5 :45 p. m.^ 

 at the American Museum of Xatural History, by the Eecording Secre- 

 tary. Senior Vice-President Charles Lane Poor then took the Chair. 

 The minutes of the meeting of 5 May were read and approved. 



The following candidate for Active Membership in the Academy, rec- 

 ommended by Council, was duly elected : 



George I. Finlay, Xew York University. 



The Eecording Secretary then reported the following deaths : 



James J. Friedrich, Active Member since 1910, 



James B. Hammond, Active Member since 1905, died 27 January, 

 1913, . 



Wm. F. Havemeyer, Active Member since 1896, died 7 September, 

 1913. 



