PHILOSOPHICAL TRANSACTIONS 
OF THE 
ROYAL SOCIETY OF LONDON 
Series A, VOL. 201, pp. 329-102. 
THE DIFFERENTIAL INYARIANTS OF A SURFACE, AND 
THEIR GEOMETRIC SIGNIFICANCE 
BY 
A. R. FORSYTH, M.A., Sc.D., F.R.S., 
SADLERIAN PROFESSOR OF PURE MATHEMATICS IN THE UNIVERSITY OF CAMBRIDGE. 
LONDON: 
PUBLISHED FOR THE ROYAL SOCIETY’ 
BY DULAU AND CO., 37,. SOHO SQUARE, W. 
CONTINENTAL AGENTS, MESSES. FRIEDLANDER AND SON, BERLIN. 
1903. 
A 339. 24 . 6 . 0-3 
Price Three Shillings ctncl Sixpence. 
