331 



any microscope stage, and was intended to make a mark on the 

 label. It consisted of a spindle fitting in the hole in the stage 

 intended to carry the side-reflector. It was there clamped. It 

 carried a hinged arm with a brass point 0*5 mm. thick, adjusted 

 to be over the slide 1 in. to the left of the centre of the objective 

 that is, equal to the amount of movement usual with an 

 ordinary mechanical stage. In use, when an object is observed 

 which it is wished to record, the brass point is wetted with ink 

 and put down on the label. It was simple in construction, and 

 very simple and easy to use. 



Mr. Inwards thought the use of metallic paper would be found 

 an improvement upon the method of making the marks. 



The Hon. Secretary thought he had seen a description of a 

 somewhat similar pointer to that which had been mentioned. 



Mr. Ainslie said the "Coon" finder, which fitted on the edge of 

 the stage and made two marks, was the one referred to, but it 

 would not be so rapid in action as the one he had described. 



The President expressed the- thanks of the club to Mr. Ainslie 

 for his interesting exhibit, which he thought was likely to prove 

 very useful to many of the members. 



At the meeting of the Club held on April 25th, the President. 

 Prof. E. A. Minchin, M.A., F.R.S., in the Chair, the minutes of 

 the meeting held on March 28tb were read and confirmed. 



Messrs. B. J. Campling, A. J. Bowtell and E. A. Pinchin were 

 balloted for and duly elected members of the Club. 



The Hon. Secretary read a list of recent additions to the slide 

 cabinet, among which were 22 slides of marine algae, mounted 

 by the late Mr. Buffham, presented by Mr. A. Smith ; 19 botani- 

 cal preparations, mounted and presented by Mr. H. Gunnery, of 

 York ; 6 slides, botanical and polyzoa, presented by Mr. C. Sid well 

 (Hon. Curator). The thanks of the members were voted to the 

 donors. 



Dr. A. C. Coles, of Bournemouth, sent some preparations 

 mounted in parolein, to show the value of that fluid as a 

 mounting medium.* It seems to be practically impossible to 

 obtain perfectly neutral Canada balsam. Even in the best 

 samples a slight trace of acid remains, and this causes more or 



* Laiicct, April 1911 ; Knowledge, May 1911, p. 192. 



