THE 



PRINCIPLES OF PHYSIOLOGY, 



BY 



JOHN AUGUSTUS UNZER; 



A DISSERTATION 



FUNCTIONS OF THE NERVOUS SYSTEM, 



BY 



GEORGE PROCHASKA. 



TRANSLATED AND EDITED BY 



THOMAS LAYCOCK, M.D. (Gottingen), 



LICENTIATE OF THE KOYAL COLLEGE OF PHYSICIANS, LONDON ; 



PHYSICIAN TO THE YOKK DISPENSARY ; AND 



LECTUEEB ON THE THEOKY AND PEACTICE OF MEDICINE AT THE YOBK MEDICAL SCHOOL. 



LONDON 



PRINTED FOR THE SYDENHAM SOCIETY 



MDCCCLI. 



