PROCEEDINGS OF THE SOCIETY. 
393 
Meeting of 15tfi May, 1895, at 20 Hanover Square, W. 
The President (A. H. Michael, Esq., F.L.S.) in the Chair. 
The Minutes of the meeting of 18th April, 1895, were read and 
confirmed, and were signed by the President. 
The List of Donations (exclusive of exchanges and reprints) received 
since the last meeting was submitted, and the thanks of the Society 
were given to the Donors : — 
From. 
Annual Report of the Bureau of Ethnology, Eleven and Twelve, 
1889-91. (2 vols. Svo, Washington, 1894) U.S. Government. 
Contributions to North American Ethnology, ix. (4to, Washing- 
ton, 1894) Ditto. 
Prof. F. Jeffrey Bell said it had been remarked that the Dutch were 
famous for giving too little and asking too much ; but if this were 
true, he thought that their American friends might be said to err in the 
opposite direction. They had during the past month been presented by 
the American Government with two volumes of Ethnological Reports, 
for which, of course, their thanks would be duly expressed, although he 
fancied that works of that class would be more likely to be usefully 
appreciated by the Society over the way than in the Library of one 
which was devoted to microscopical science. 
Mr. J. Swift exhibited an improved form of the Nelson Microscope- 
lamp, fitted with mechanical movements by which the position of the 
burner could be moved both horizontally and vertically within certain 
limits, so as to facilitate the adjustment of the light without the need 
for moving the lamp-stand. He also showed a Wales Microscope, which 
had been fitted with one of the new mechanical stages, allowing a move- 
ment of 2 in. with a slide 3 in. long. 
The President thought the application of mechanical movements to 
the lamp would certainly be found of great advantage in certain cases, 
enabling the position of the flame to be altered with great nicety without 
disturbing anything else. They were much obliged to Mr. Swift for 
bringing it under their notice. 
Mr. T. Comber read a paper, “ On the Development of the young 
Valve of Trachyneis aspera (otherwise known as Navicula aspera and 
as Stauroneis pulcherrimcL )” ; the subject being well illustrated by a 
number of exceptionally fine lantern photographs exhibited upon the 
screen. 
Dr. D. H. Scott said that his knowledge of the subject dealt with in 
the paper was very slight, but he should like to be allowed to express his 
admiration of the beauty of the photographs exhibited, and the astonish- 
ing way in which the various stages were shown in this remarkable 
process of development. 
The President said that he should also like to express his extreme 
admiration as to the way in which this paper had been worked out, and 
