412 PROCEEDINGS OF THE 



Messrs. Zeiss exhibited the new oil-immersion l/7th on four 

 microscopes, and the thanks of the meeting were accorded to 

 Messrs. Zeiss and to M. Koch, who represented the firm. 



At the 498th ordinary meeting of the Club, held on April 28th, 

 1914, the Vice-President, Mr. D. J. Scourfield, F.Z.S.,F.R.M.S., 

 in the chair, the minutes of the meeting held on March 24th 

 were read and confirmed. 



Messrs. Edward Carlile, Francis Cooley-Martin, Gerald Burton 

 Burton-Brown, M.D., Francis Edward Robotham and Daniel 

 Arthur Davies, jun., were balloted for and duly elected members 

 of the Club. 



The list of donations to the Club was read and the thanks of 

 the members voted to the donors. 



The Hon. Sec. read a note on " A New Low-power Con- 

 denser," communicated by Mr. E. M. Nelson, F.B..M.S. 



Mr. C. Lees Curties (Messrs. C. Baker) exhibited both the 

 low -power condenser designed by Mr. Nelson and also a simple 

 centring-stop holder which he had suggested. 



Replying to a question, Mr. C. Lees Curties said that the 

 aperture of the condenser was 0*55. On account of its long 

 working distance, the condenser would be particularly useful for 

 dark-ground illumination when examining pond-life in a 

 trough. 



Mr. M. A. Ainslie said that the Leitz achromatic condenser 

 with the top off had an aperture of 0'6, and a working distance of 

 one-third of an inch. He would suggest that, when necessary, 

 the condenser should be decentred, in order to centre the stop. 

 He frequently did this with low powers, when necessary. 



Votes of thanks to Mr. Nelson and to Mr. Curties were pro- 

 posed and carried unanimously. 



Mr. N. E. Brown, A.L.S., gave an account illustrated with 

 fresh specimens of the flower and a coloured drawing of a longi- 

 tudinal section of " The Fertilisation of Vinca minor" He 

 said that a very interesting microscopic object was concealed in 

 this flower. As regards its fertilisation, a special interest was 

 connected with the flower of the periwinkle. The fruit of this 

 plant is extremely rare, not only in this country, but also on the 

 Continent. The flower has a. very remarkable structure, and a 



