232 
PROCEEDINGS OF THE SOCIETY. 
The result of the appeal for special subscriptions from Fellows was 
that the income from subscriptions was increased by £100 18s. 2d., 
and on the expenditure side of the account a special donation of 
50 guineas was made to the Marine Biological Association. 
It will therefore be noted that without the special appeal the 
account would have shown an excess of Expenditure over Income of £40. 
The income from Admission Fees is the highest recorded in the 
history of the Society. The Council wish to impress upon Fellows the 
continued necessity of getting as many new Fellows as possible, in order 
that the improvement shown may be maintained in the current year. 
The President (Professor Cheshire) exhibited a simple thorium-disc 
lamp designed by himself. The figure shows the lamp half -size. In 
parallel holes in a short piece A, of square section brass rod, a brass 
tube B and a steel rod C are soldered. The brass tube is fitted with a 
nipple— bored with an 80 Morse drill — at one end and with an enlarge- 
ment for engaging a rubber tube at the other. A tube D, carrying an 
upright wire E, slides on the rod C and bears a platinum wire F, to the 
fc_Ni.fmqED View of 
Nipple. 
end of which the thorium disc is secured. A shade, if required, is 
provided in the form of a short tube G, which slides on the rod C, to 
which it is clamped by a screw. When the axis of the tube G is parallel 
to and vertically above the axis of the jet, the available emission angle 
is a, and this is usually sufficient. It can, however, be increased by 
tilting the tube on its clamp, as shown in dotted lines. The lamp can 
be very simply fitted to a stand such as that of a bull’s-eye condenser. 
