PIERRE de P. RICKETTS, Ph. D. 
JOHN H. BANKS, E. M. 
METALLURGISTS, CHEMISTS AND MINING ENGINEERS. 
Telephone Call, "39th Street. 143." 
Cable Address, "RICKETTS," New York. 
Cable Codes, 
Clauson-Thue’S "A. B. C." 
Moreing'S " MINING." 
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