CONTENTS. 



(A) 

 VOL. 191. 



Advertisement page vii 



List of Institutions entitled to receive the Philosophical Transactions or Proceedings of the Royal 



Society ix 



I. Memoir on the Integration of Partial Differential Equations of the /Second Order 



in Three Independent Variables when an Intermediary Integral does not exist 

 in general. By A. R. FORSYTH, F.R.S., Sadlerian Professor in the Univer- 

 sity of Cambridge page 1 



II. On the Change of Absorption produced by Fluorescence. By JOHN BURKE, 



M.A., Berkeley Fellow of the Owens College, Manchester. Communicated by 

 Professor ARTHUR SCHUSTER, F.R.S. 87 



III. On the Occlusion of Hydrogen and Oxygen by Palladium. By LUDWIG MONO, 



Ph.D., F.R.S., WILLIAM KAMSAY, Ph.D., F.R.S., and JOHN SHIELDS, D.Sc., 

 Ph.D 105 



IV. Comparative Photographic Spectra of Stars to the 3^ Magnitude. By FRANK 



McCLEAN, F.R.S. ... 127 



V. On the Application of Harmonic Analysis to the Dynamical Theory of the Tides. 



Part II. On the General Integration of LAPLACE'S Dynamical Equations. 

 By S. S. HOUGH, M.A., Fellow of St. John's College and Isaac Newton 

 Student in the University of Cambridge. Communicated by Professor G. H. 



DARWIN, F.R.S. 139 



a 2 



