■+51 



{^.rti^ THE 



SENSE OF TOUCH 



IN MAMMALS AND BIRDS/ 



WITH SPECIAL REFERENCE TO THE 

 PAPILLARY RIDGES 



l^I 



walter'^<:idd, m.d., f.z.s. 



AUTHOR OF "USE-INHERITANCE," AND "THE DIRECTION 

 OF HAIR IN ANIMALS AND MAN" 



WITH 1G4 ILLUSTRATIONS FROM 

 DRAWINGS AND MICRO-PHOTOGRAPHS 



LONDON 

 ADAM AND CHARLES BLACK 



1907 



