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" Proceedings of the Postal Mici'oscopical") -, ., a . . 



° f From the Society. 



Society" ... ... ... ... ) 



" Twelfth Annual Report of the Chester") 

 Microscopical Society" ... ... ) 



" Annals of the Belgian Microscopical") 

 Society " ... ... ... ... ) 



" The American Monthly Microscopical") .1 Editor 



Journal" ... ... ... ... ) 



"Dr. Braithwaite's British Moss Flora/'] the Author 



Part 7 • * 



" Annals of Natural History " Purchased. 



A new Compressorium From Mr. J. D. Hardy. 



The thanks of the meeting were voted to the donors. 

 Dr. Matthews exhibited another device for facilitating the exchange of 

 objectives whilst working with the microscope. He said that several 

 ingenious devices had been brought out from time to time for exchanging 

 objectives without loss of time; the multiple nose-piece was one of 

 these, and that had not succeeded on account of its weight and other 

 difficulties. At a recent meeting Mr. Nelson and some other gentlemen 

 had brought out some more simple contrivances, which seemed to answer 

 the purpose, but it would perhaps be remembered that he had a long time 

 ago mentioned a still more simple mode of adjusting objectives to nose- 

 pieces, and he had now carried the plan into effect. It consisted of a short 

 adapter in the form of a hollow cone, which was screwed into the ordinary 

 nose-piece, and of another piece coned down exactly to fit inside the first 

 one, which was screwed on the objective. The only action required was 

 then just to push the one into the other, and as they fitted accurately there 

 was quite sufficient adherence to keep the objective in its place. It was of 

 course just possible that a blow might cause the objective to drop out, 

 but this in practice was hardly likely to happen; there could be nothing 

 more simple than this kind of attachment. 



Mr. Ingpen was glad that Dr. Matthews had brought up this adapter, 

 which was certainly extremely simple, and would be a form supplemental 

 to what had been already described ; time would no doubt show which of 

 the various contrivances was really the best for general use. 



Dr. Matthews, in reply to questions, stated that the arrangement was 

 very inexpensive, the hollow cone could be kept on the nose-piece of the 

 microscope, and the others screwed on the objectives, so that either could 

 be used as required. The centering of the objectives was likely to be more 

 accurate than if they were screwed on in the usual way. 



Announcements of meetings, &c, for the ensuing month were then made, 

 and the ordinary business terminated. 



The meeting was then made special for the purposes of the 18th Annual 

 General Meeting. 



The Secretary read the 18th Annual Eeport, also the Treasurer's Annual 

 Statement of Account for the past year. 



Dr. Matthews in moving " that the Reports now read be received and 



