648 NEW YOEK STATE MUSEUM 



Tests of Haverstraw brick made by M. Abbott. ]^o packing 

 was put between brick and plate of testing machine. 



Crushing 



strengrth ni 



lb. per sq. in. 



, Maximum 3 060 



Whole brick tested on end ■ • • < Minimum 1 600 



' Average 2 065 



, Maximum 4 153 



Half brick tested on flat side. ) Minimum 2669 



; ( Average 3 371 



, Maximum 6 400 



Half brick tested on edge. . . ) Minimum 2 900 



• ( Average . '. 4 612 



Tests of ISTewfield brick made at Cornell university. 



Lb. per 

 sq. in. 



Repressed brick 14 990 



Common 9 300 



Common 10 900 



Common from top clay 7 880 



Some years ago E. S. Fickes made a number of crushing and 

 absorption tests of common brick {Eng. news. 1894. 32 :495), from 

 which the following tests of IsTew York products are derived. 



Locality 



Rochester . 



T, . J Pressure 



absorption P-^Cf 



Material 



12.2;^ 8 460 Clay and sand 



Fishkill 14.8^ 5 840 



Troy 15.1^ 4 400 



Clay 



Clay and sand 



Machine 



Soft mud; hard; 



common 

 Soft mud 

 Soft mud; hard; 



common 



Tests of building and other' trick 



A large series of shearing, crushing and absorption tests have 

 been made at the Watertown (Massachusetts) arsenal on material 



