PEOCEEDINGS OF THE SOCIETY. 225 



Mr. E. M. Nelson ^ave an interesting resume of his paper on the 

 Tube Length of the Microscope, explaining the difference between the 

 mechanical and the optical tube length, and freely illustrating the subject 

 by drawings and formulae upon the black-board. The paper is printed 

 in full in the present number of the Journal. 



The Chairman, in moving a vote of thanks to Mr. Nelson for his 

 extremely interesting and useful communication, said there was no 

 subject connected with the technique of the Microscope about which 

 ideas were vaguer than that of tube length, because most people thought 

 that it was the length of the brass tube. Although it had often been 

 pointed out in that room that what was really meant was the optical 

 tube length, the subject did not seem yet to be very well understood ; 

 indeed very little practical information had hitherto been published as 

 to how a person was to ascertain what the tube length of his Microscope 

 really was. Mr. Nelson had now given them a method by which this 

 could be found, and their cordial thanks were due to him for bringing 

 the matter before them. 



The thanks of the Society were cordially voted to Mr. Nelson for his 

 communication. 



Mr. F. W. Millett's paper ' On the recent Foraminifera of the Malay 

 Archipelago,' Part X., was taken as read, it beiug intimated that it 

 would be found printed, with a plate in illustration, in the current 

 number of the Journal. 



The Chairman said he should like, before the business of the Meeting 

 was finished, to call attention to the very beautiful set of slides of 

 bacteria and blood parasites which were exhibited under the Microscopes 

 on the table, and for which they were indebted to Mr. Conrad Beck ; 

 and at the same time to thank him for the great trouble he had taken in 

 getting up this exhibition. He was quite sure that these examples of a 

 class of bodies which appeared to play such an important part in questious 

 of health and disease would be examined with extreme interest. 



He had great pleasure in moving that the best thanks of the Society 

 be given to Mr. Beck for his trouble and attention in the matter. 



The motion, having been put from the chair, was carried by 

 acclamation. 



Dr. Hebb said that Mr. Bousselet was also exhibiting under the 

 Microscope some Rotifers which had been sent from Natal. 



The Chairman said it had been resolved by the Council to present 

 an Address to the King, who, before he became King, was the Patron 

 of their Society. Their Secretaries had prepared an Address for the 

 purpose, and would now read it for approval and adoption by the Fellows 

 present. Dr. Hebb then read the proposed Address as follows : — 



To the King's Most Excellent Majesty. 



" May it please Your Majesty, — 



" We, Your Majesty's dutiful and loyal subjects, the President, 

 Council and Fellows of the Royal Microscopical Society, in General 

 Meeting assembled, humbly beg leave to offer our most sincere and re- 

 spectful Condolences to Your Majesty on the loss which you and the 



April 17 th, 1901 q 



