CROONIAN LECTURES 



MATTER AND FORCE. 



GIVEN AT THE ROYAL COLLEGE OF PHYSICIANS 

 IN 1868. 



HENRY BENCE JONES, A.M., M.D., F.R.S., 



CONSULTING PHYSICIAN TO ST. GEORGE'S HOSPITAL. 



LONDON: 



JOHN CHURCHILL AND SONS, 

 NEW BURLINGTON STREET. 



M.DCCC.LXVm. 



