128 



PKOCEEDINGS OF THE SOCIETY. 



MEETING 



Held on the 21st of Decembee, 1910, at 20 Hanover Square, W., 

 Dr. E. J. Spitta, in the Chair. 



The Minutes of the last Meeting were read and confirmed. 



The List of Donations (exclusive of exchanges and reprints) re- 

 ceived since the last meeting was read as follows, and the thanks of the 

 Society were voted to the donors. 



From 

 Jean Massart, Esquisse de la Geographie Botanique de la Bel- j 



gique, 2 vols., Text and Annexe containing 466 photographs, ! y^ g Author 

 9 charts and 2 diagrams. (8vo, Bruxelles, Henri Lamertin, f 



1910) ) 



Leo Errera, Recueil d'CEuvres de Le'o Errera Physiologies Madame Leo 



Gene'rale Philosophie. (8vo, Bruxelles, H. Lamertin, 1910) j Errera. 



Jas. Murray, British Antarctic Expedition, 1907-9, Vol. 1.1 Sir Ernest 



Biology, Part V. Tardigrada. (4to, London, 1910) . . . . J Shackleton. 



Mr. W. Traviss exhibited a small Microscope Lamp, of which he 

 gave a short description. He considered it very efficient for opaque 

 objects and dark-ground illumination with high powers, also with 

 polarized light, especially where the prisms are small ; it was simply 

 made, beautiful in appearance, and was easily moved up and down by 

 means of a square pillar-tube made of f-in. square brass tube about 

 6 in. high, fixed at one corner of a small iron tripod of about 5 in. 

 span. Sliding over this is another square tube, which is " sprung " so 

 as to give an even tension. On the upper end of the larger tube is 

 fixed a solid square elbow, into which a hole is drilled and tapped to 

 take a small gas tap and another ordinary brass elbow pointing down- 

 wards, on to which an incandescent burner with inverted mantle is fixed. 

 A small nipple is fixed on the solid end of the larger square tube to 

 take a small rubber tube, which is to be connected with an ordinary 

 gas-burner. The nipple can be on either side, up or down, or on end 

 so as to form a T with the solid elbow. 



The Chairman asked whether there was any objection to the rubber 

 tube being placed so near the heat of the lamp ? 



Mr. C. E. Heath said that he had had practical experience of the 

 lamp and had had no difficulty in this way, and considered the danger 

 to which the Chairman referred could be overcome by using a flexible 



