CONTENTS — (continued). 



EAGH 



cond Report on a Series of Specimens of the Deposits of the Nile Delta, 

 obtained by Boring Operations undertaken by the Royal Society. By 

 John W. Jttdd, C.B., LL.D., F.R.S., Professor of Geology in the Royal 

 College of Science. Communicated by desire of the Delta Committee . 32 



The Paleolithic Deposits at Hitchin and their Relation to the Grlacial Epoch. 

 By Clement Reid, F.L.S., F.G-.S., of the Geological Survey of the United 

 Kingdom. Communicated by Sir Aechibald G-eikie, F.R.S. . . .40 



Luminosity and Photometry. By J ohn Beeet Hatceaet, M.D., University 



College, Cardiff. Communicated by Professor Schaeeb, F.R.S. . . 49 



