LXXXII. 



W. H. WARREN AND S. H. BARRACLOUGH. 





1 Ratio of 

 Ultimate strength 



crushing of pier to _ 

 load tons 1 a single Remarks, 

 persq. ft. brick (295 



tons sq.ft. 



The hair crack occurred which gradually 

 opened out until 68 tons was reached, when 

 fracture occurred, every brick breaking. 



Fine cracks occurred and the column split 

 longitudinally on all four sides— every brick 



fractured. 



The column broke at 50 tons. 



Column cracked on all four sides at 40 tons, 

 cracks gradually widened till fracture occurred. 

 Eccentricity 4 inches. 



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