i896.] MICROSCOPICAL JOURNAL. i§l 



MICROSCOPICAL SOCIETIES. 



Quekett Microscopical Club. 



The 34<»th ordinary meetinji;- of this club was held on 

 Friday, March 30th, Mr. J. G. Waller, president in the 

 chair. The minutes of the preceding- meeting- were read 

 and confirmed, ballot for new members taken, the addi- 

 tions to the library announced. Mr. Rousselet read a 

 paper "on Rattula co//aris, and other Rotifers." Mr. E. B. 

 Green read a further "Note on Root-Hairs," accompanied 

 b}^ some beautiful drawing-s, which he presented to the 

 club. In answer to questions Mr. Green said all his obser- 

 vations had been made on common plants; no g-reenhouse 

 was required, and he had contrived a small case holding- 

 about 20 pots which would stand in any window, and by 

 means of which his experiments could easil}" be repeated 

 and extended. Mr. Karop gave an account of the life-his- 

 tory of the Mycetozoa, illustrating; his remarks by colored 

 diag-rams and black-board drawing-s. After noting- the lit- 

 erature of this interesting- subject, he recommended every 

 intending observer to procure Mr. Lister's "Guide to the 

 Brit. Mycetozoa," published by the trustees of the British 

 Museum, and to be had at South Kensington, or of the au- 

 thorized booksellers, price 3d. It contained a list of all the 

 known indigenous species, and was well illustrated. The 

 secretar}' said that as the first Friday in April was Good 

 Friday, the usual conversational meeting- would, of course, 

 not be held. The next ordinary meeting was on Friday, 

 April 17th, and on the 18th, an excursion to the Roj'al Bo- 

 tanic Gardens. 



The 341st ordinary meeting- of this club was held on Fri- 

 day, April 17th, Mr. E. M. Nelson, exhibited and described 

 a new doublet bull's eye which Mr, Baker had made to his 

 formula, g-iving- a minimum of spherical aberration. By 

 projecting- the imag-e of a lamp flame on a wall he showed 

 that the usual "fluffy" margin was ver}' materially reduced, 

 and he thought where it was necessary to fill a larg-e field 



