rl8 NEW YORK STATE MUSEUM 



Test no. Sample No. of blows 



21 & 22 Buffalo cement co. limited, Buffalo 17 



17 

 20 

 21 

 29 

 24 

 28 

 26 



23 & 24 C. Worlock, Perrjville • 8 



11 

 10 

 11 

 7 

 10 

 13 



25 & 26 C. B. Whitmore, Lockport 2 



3 

 6 

 5 

 5 

 2 

 3 



27 & 28 W. T. Smith, Sharon Springs 37 



50 



65 



(imperfect) 12 



29 & 30 The Carpenter Bros. Co. Guttenberg N. J. 50 



61 

 49 

 55 

 65 



