COURSE OF LECTURES 



ON 



NATURAL PHILOSOPHY 



AND THE 



MECHANICAL ARTS. 



BY THOMAS YOUNG, M.D. 



FOR. SEC. R.S. F. L.S. MEMBER OF EMMANUEL COLLEGE, CAMBRIDGE, 



AND LATE PROFESSOR OF NATURAL PHILOSOPHY IN THE 



ROYAL INSTITUTION OF GREAT BRITAIN, 



IN TWO VOLUMES. 

 VOLUME IL 



LONDON: 



PRINTED FOR JOSEPH JOHNSON, ST. PAUL's CHURCH YARU, 

 BY WILLIAM SAVAGE, BEDFORD BURY. 



1807. 



