i833. 



67 



Trans. N. Y. Ac. Set. 



January 29, 1883. 

 Section of Geology. 



The President, Dr. J. S. Newberry, in the Chair. 



Seventy-five persons present in the large Hall. 



The President announced the death of a Resident Member, 

 Dr. George M. Beard, and remarked on his scientific attain- 

 ments, and investigations of the phenomena of mesmerism and 

 the trance state. 



Dr. A. A. Julien read a paper on 



" THE DECAY OF THE BUILDING STONES OF NEW YORK CITY," 



(with Lantern Illustrations from American and Foreign Archi- 

 tecture). 



(Abstract). 



The paper, which will be published in fall by the Building-Stone 

 Department of the Tenth Census of the United Sta'es, considers the 

 building stones employed in New York City and its suburbs, i.e., 

 Brooklyn, Staten Island, Jersey City and Hoboken. 



/. T/ie buildings, their numbers and conunon materials. 

 The materials of general construction occur in the following per- 

 ■centage proportion to the total number of buildings in the cities slated 

 in the table below ; 



In Nev York City proper, the several varieties of stone are used in 

 the following proportion to the entire number of stone buildings: 



Brown sandstone 78.6 | Ohio sandstone 1.6 



Nova Scotia sandstone 90 Gneiss 0.9 



Marble 7.9 , Foreign sanclst(;ne o.i 



iGranyte i.d blaestone and liniesior.e. . . .0.1 



In Brooklyn, the Connecticut brownstone is the variety predominating 



