351 



The thanks of the meeting were voted to the donors. 



Mr. H. Morland read a paper entitled, " Notes on Mounting Diatoms." 



Mr. Karop felt sure that this paper would be found most useful as a 

 practical help to those who were interested in the subject. It often became 

 his duty as secretary to badger members into giving them papers for the 

 meetings, and he was glad to find that on this occasion he had badgered 

 Mr. Morland to such good purpose. A short time ago he spent an evening 

 with Dr. Gray, who was well known to many of the members as a very 

 expert mounter, and in course of conversation on the subject it appeared 

 that the bristle he had found most suitable was obtained from a cow's 

 neck. He gave him some from a supply which he had. Dr. Gray said he 

 never used the gum process at all, but he thought it might be useful when 

 arranging the diatoms in series. He did not employ the breathing process 

 either, and as a medium he simply used styrax, not diluted, but melted by 

 the application of heat. It was well known that experts often arrived at 

 the same results by different methods, and he thought it would be interest- 

 ing to be able to compare Mr. Morland' s procedure with that of Dr. Gray. 



Mr. Morland said that the bristles he used were the finest he could pick 

 out. 



Mr. T. F. Smith said he had a type slide of Aulacodiscus in which nine- 

 tenths of the diatoms were mounted with the spots the wrong side upwards. 

 He should like to ask if it was not possible to put them on the slide the 

 right way up ? 



Mr. Morland said most decidedly it was possible to mount them in any 

 position, but he had no doubt they were mounted in that way because if 

 placed the other way the gum would most likely run in and fill them up. 



Mr. Michael said he had no doubt that the bristle which Mr. Morland 

 used was very suitable for his purpose, but he should not like it to go out 

 from there that the bristle from a badger's hair shaving brush was an 

 invention of the books, because it was what he had been using himself for 

 years ; in fact it was his ordinary mounting instrument for delicate work, 

 bo that he kept a brush by him ready for use. A single badger hair put 

 into a split lucifer match was the best instrument he knew of for his 

 particular purpose, and though a stiffer one might do for diatoms, for more 

 delicate purposes a soft bristle was most invaluable. 



The President thought the members would agree that this was one of 

 the most valuable contributions they had had upon this subject, and one 

 for which they would no doubt accord a very hearty vote of thanks. 



The thanks of the meeting were unanimously voted to Mr. Morland for 

 his paper. 



Mr. Eousselet read a paper on Perophora Listeria illustrating the subject 

 by diagrams and specimens exhibited alive under the microscope. 



Professor Stewart said he had nothing to add to the paper which had 

 been read, the subject of which was certainly one of the most beautiful 

 creatures it was possible to find. He remembered seeing the creature 

 many years ago, and thought it was the study of it which first led him to 

 appreciate the value of the binocular microscope, which enabled him to see, 



