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1Kb® 
‘The Nature & Development 
Mam. 
OF 
Animal Intelligence 
By 
WESLEY MILLS, MEAS VED NCSe ERS: C: 
PROFESSOR OF PHYSIOLOGY IN M‘GILL UNIVERSITY, MONTREAL, CANADA, 
AUTHOR OF ‘‘ ANIMAL PHYSIOLOGY,” ‘‘ COMPARATIVE PHYSIOLOGY,” 
‘“THE DOG IN HEALTH AND IN DISEASE,” ETC. 
Foe 
NEW YORK 
THE MACMILLAN COMPANY 
MDCCCXCVIII 
