March 9th, 1897.'] Proceedings. 



XXXI. 



Ordinary Meeting, March 9th, 1897. 



Professor Osborne Reynolds, F.R.S., Vice-President, 



in the Chair. 



The thanks of the members were voted to the donors of 

 the books on the table. 



The Chairman announced that, as April 20th falls in 

 Easter week, the Council had, by resolution under Rules 

 28 and 38, determined that the Ordinary and Annual 

 General Meetings put down for that date on the card of 

 meetings, should be held on Tuesday, April 27th, at 

 half-past six o'clock. 



Dr. C. H. Lees gave a short account of Zeeman's experi- 

 ments on the effect of a magnetic field on the vibrations 

 emitted by a source of light, and gave a short explanation 

 of the results from the point of view of the later develop- 

 ments of Maxwell's electro-magnetic theory of light. 



Professor Reynolds and Professor Lamb took part in a 

 discussion which followed. 



Dr. F. H. Bowman described the method of working of 

 the Marconi telegraphic receiver, which, he said, could be 

 easily carried about without disturbing its sensitiveness or 

 the arrangements to make its period synchronous with 

 that of the transmitter. By this apparatus messages 

 might be received at a distance of two miles without 

 wires, and it seemed to be capable of practical use, for 

 instance, in communicating between lighthouses and ships 

 or with the shore. 



Professor Horack Lamb, F.R.S., read a paper entitled: 

 " On Continuity." 



This paper is printed in full in the Memoirs. 



Professor Reynolds, Dr. Lees, Dr. F. H. Bowman, Mr. 

 Angell, and Mr. Gwyther took part in the discussion 

 which followed. 



