XXVill NARRATIVE OF THE CENTENARY MEETING. 
Forestry, Department of (K*).—The British Wood-preserving Associa- 
tion arranged an exhibit of wood-preservation in connection with com- 
munications to the Department on Thursday, September 24. The exhibit 
remained open throughout the Meeting. 
Geological Exhibits—Special exhibits and demonstrations were 
arranged at (a) the Museum of Practical Geology and Survey Offices, 
27 Jermyn Street, Piccadilly, where an extensive series of maps and 
specimens illustrating the Geology of London and the Home Counties 
were on view; and (b) the British Museum (Natural History), Cromwell 
Road, South Kensington. Here the following special exhibits were on 
view :— 
. A History of paleontology (with special Guide). 
. Paleontology and evolution. 
. Fossil reptiles. 
. Recent work on the anatomy of fossil Brachiopoda. 
. Trends in fossil corals. 
. Problematic fossils. 
. Paleontological metheds in the workshop. 
There was also an exhibition of maps and memoirs by the Geological 
Survey in the De la Beche Laboratory, Royal School of Mines. 
AD OOF Wb eR 
Geophysical Instruments, &c.—An exhibit of geophysical instruments 
and survey methods was shown in the Science Museum, through the 
courtesy of Sir Henry Lyons, F.R.8., during the period of the Meeting, 
and in connection with the discussion on Geophysical Methods of 
Prospecting in Section A, Friday morning, September 25. 
King’s College of Household and Social Science, Campden Hill Road, 
W.8.—The Biological, Chemical and Physiological Laboratories were 
open to inspection on Friday, September 25, Monday, September 28, and 
Tuesday, September 29, from 2.30 to 5 p.m. 
Mathematical and Physical Sciences (Section A).—During the Meeting, 
Prof. Kerr Grant exhibited in the Physics Laboratory, adjacent to the 
Section room, asimple static voltmeter, a surface tension meter, a model 
of inertia coupled oscillators, and a contrivance for demonstrating the law — 
of errors. 
Mechanical Aids to Learning.—The second exhibition of Mechanical 
Aids to Learning was held from Tuesday, September 22, to Tuesday, 
September 29 inclusive, at South Kensington. Arrangements were made 
by the British Institute of Adult Education, through a joint organising 
committee on which the British Association, through its Education 
Section (L), and the Commission on Educational and Cultural Films, were 
represented. The exhibition comprised (a) exhibits of apparatus con- 
nected with broadcasting, television, the film, the gramophone, the 
epidiascope, and other similar inventions, with demonstrations of their 
working ; (b) a series of lectures, discussions and demonstrations of the 
use of these types of apparatus under class-room and lecture-room con- 
ditions. ‘The exhibition was housed in the Imperial Institute, the Institut 
Frangais (1-7 Cromwell Gardens), and the Lecture Theatre of the Science 
Museum. Members were admitted without charge. 
