337 



appreciation and sympathy were then put to the meeting by the 

 Chairman and carried with acclamation. 



Mr. J. W. Ogilvy, F.R.M.S., for Messrs. Leitz, exhibited and 

 described a recent invention of his firm for rendering visible 

 particles in smoke or gases and in liquids. It was on the 

 principle of the dark-ground condenser. Replying to a question 

 by the chairman, Mr. Ogilvy said he did not think the size of 

 smoke particles had yet been measured. Siedentopf had measured 

 the size of particles in liquids. 



The Hon. Secretary thought that the most interesting thing 

 about this exhibit was the microscope under which it was shown, 

 seeing that this approximated more nearly to the English pattern 

 than anything he had yet seen made by any foreign maker. 



Mr. Ogilvy said that this instrument had been made by 

 Messrs. Leitz to his own instructions ; the upper part was on 

 the usual Leitz model, and it was fitted with their new fine 

 adjustment, but the stage was not yet complete. Another 

 similar instrument was being made, which would be still further 

 improved, and would be so arranged that both long and short 

 tube lengths could be employed to suit various objectives. 



Messrs. Watson &, Sons exhibited a series of seven preparations 

 illustrating the development of the chick. The stages shown 

 were at the following periods of incubation : 24, 32, 40, 48, 60, 

 72 and 96 hours. The embryos are suitably stained, and are 

 mounted in deep cells. The slides are issued with a leaflet fully 

 describing each stage. The same firm also exhibited a new form 

 of dissecting compound microscope fitted with a Porro prism 

 erector. 



On the motion of the Ciiairman a vote of thanks was passed 

 to Messrs. Leitz and Watson &, Sons for their exhibits. 



The Secretary said they would regret to hear that owing to 

 his present serious condition Mr. Alpheus Smith had felt obliged 

 to resign his position of Hon. Librarian, which he had held for 

 so many years. Whilst expressing their regret at Mr. Smith's 

 retirement he proposed that a hearty vote of thanks be given 

 to Mr. Smith, with an expression of their sympathy on account 

 of the accident which had incapacitated him for a time. 



The Chairman said the Club had been very fortunate in having 

 the services of Mr. Smith for so long a period, for he had been 

 their librarian for nearly forty years, during which time he had 



