148 PROCEEDINGS OP THE SOCIETT. 



Fellows elected during the year to forty-seven, irrespective of eight 

 more who were nominated that evening, and making 105 elected 

 during the last two years. Taking as he did the greatest interest 

 in the welfare of their Society, and in the continued prosperity of the 

 Journal, he most heartily desired that these additions would not only 

 continue, but would go on still increasing. 



Mr. Wallis exhibited and described his new form of rotating 

 substage, carrying achromatic condenser, dark-field illuminator, dark 

 wells, polariscope, and selenites (see p. 125). 



Mr. Crisp said that while few would probably avail themselves of 

 such an arrangement as this in connection with a large instrument 

 used at home with every accessory within reach, yet in the case of a 

 portable or travelling Microscope it was a different matter, and he was 

 inclined to commend a contrivance of that kind for such a purpose. 



Mr. Crisp exhibited and described Parkes's Child's Microscope, 

 Holman's new compressorium (a di'awing of which was made upon the 

 board), and his moist chamber, which was a combination of the 

 animalcule cage and the siphon slide (see p. 142), also Beck's "lever 

 and spring cell-making machine " with removable legs and clamp for 

 table, and their rotating cell-holder exhibited at the last meeting, 

 but with the rubber-cells in situ (see vol. iii. p. 1041, and ante, p. 124), 

 also some wax cells covered with white zinc cement for fluid mounts, 

 sent by Mr. W. H. Walmsley, of Philadelphia. 



Mr. John Mayall, jun., exhibited and described a spiral diaphragm 

 which he had devised, drawings on the board and a cardboard model 

 being used in illustration (see p. 126). 



The Chairman announced that a Fellow had offered to the Society 

 a fund to be applied for a gold medal, to be bestowed under cer- 

 tain conditions upon any person of any nationality who shall have 

 originated any important improvement in the construction of the 

 Microscope or any of its accessory apparatus, or have in other ways 

 eminently contributed to the advancement of the Microscope as an 

 instrument of research. Another Fellow had also offered a similar 

 fund for a medal to be given in respect of researches in any subject 

 of natural science carried out wholly or in great part by means of the 

 Microscope, or of the recipient having in other ways eminently con- 

 tributed to the advancement of research in natural science in connec- 

 tion with the Microscope, the two medals to be known respectively as 

 the " Microscopical " and " Kesearch " Medals of the Society. The 

 Council had decided to bring the subject formally before the next 

 Meeting, with the view to the accejitance of the terms on which the 

 funds were offered. 



Dr. C. T. Hudson's paper " On (Ecistes Janus and Floscularia trifo- 

 lium, two new species of Kotifers," was read by Mr. Stewart, by whom 



