6Y 



Trans. N. Y. Ac. Set. 



January 29, 1883. 

 Section of Geology. 



The President, Ur. 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 full by the Building-Stone 

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

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

 Brooklyn, Staten Island, Jersey City and Hoboken. 



/. 77^1? buildings, their numbers and common 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 : 



No. of buildings. . 

 Brick and stucco . 



Frame 



Stone 



Iron 



100,193 

 63.2 



24-3 



1 1.6 



0.9 



ffl 



75,526 



39-9 

 50.9 



9-' 

 0.1 



6,284 



327 

 64.7 



2.6 



Wo 



210,608 



47-9 

 42.5 



91 

 0.5 



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 , F.)reign sandstone o.i 



(Granyte 1.8 ' bluestone and linieslo.'.e. . . .0.1 



In Brooklyn, the Connecticut brownstone is the variety predominating 



