215 



The thanks of the meeting were voted to the donors, especially 

 to the President for his valuable contribution to the library. 



Mr. Swift exhibited a folding microscope made entirely of 

 aluminium, the weight of which was about 21b. as against 5^1b. 

 for the same instrument in brass. 



Mr. Goodwin inquired whether there was enough weight to 

 keep the microscope steady. 



The President said that he had often remarked that to ensure 

 steadiness they must must have a proper sized base. In con- 

 tinental instruments they got the steadiness by having a solid 

 foot, and depended chiefly upon weight, but the one before 

 them had such an enormous spread of foot that without beino* 

 heavy it was absolutely steady. 



Mr. Karop thought everyone would be pleased to see this 

 microscope, which he believed was only the second which had 

 been made entirely of aluminium. The difference in weight 

 would be appreciated by those who wanted an instrument 

 which they could carry about easily. He found that one of 

 the chief donations to the €lub that evening was one not 

 mentioned in the list which had been read, and that was a 

 further gift of 57 slides of Rotifers from Mr. Rousselet, bring- 

 ing up the number already presented to 117. As a type 

 series these slides would possess a unique value, and they 

 were very greatly indebted to Mr. Rousselet for his valuable 

 gift. 



Mr. Karop exhibited on behalf of Mr. Curties a simple 

 method of attaching microscope objectives, by which when the 

 objective was placed in position a quarter turn sufficed to 

 tighten it, or loosen it as the case might be. He felt sure the 

 members would hear with very great regret that their friend 

 Mr. Curties was at that moment lying very seriously ill. 



Mr. Ingpen said he had used this method for some time, and 

 found it extremely good ; it sometimes happened that the three 

 small projections did not at the moment catch the objective 

 but he had used a very similar contrivance designed by their 

 President, and had found this also to be most satisfactory. 



The President said he also had tried it, and thought it a use- 

 ful nose-piece. 



Mr. Richard Smith exhibited a microscojoe almost identical 

 with that already shown by Mr. Swift except that the lower 



