XX 
PROCEEDINGS, 
The scientific investigation of dew-ponds might have valuable 
economic results, enabling farmers to fix upon the best possible 
sites for them, and so prevent the waste of a considerable amount 
of money, for many are now made which prove to he useless in 
times of drought. 
Geological Photographs. —Mr. Horace Monckton said that the 
Geological Photographs Committee wished to obtain the co-operation 
of the Corresponding Societies. The number of geological photo¬ 
graphs in the British Association’s collection was 2,655, the number 
received during the past year being 309, not including duplicates 
and lantern-slides. It was obvious that the taking of geological 
photographs was a work which could he most usefully done by 
members of the Societies. Very little has been done in Hertfordshire. 
Erratic Blochs. —Mr. Monckton also asked for the co-operation 
of the Corresponding Societies with the Erratic Blocks Committee. 
Individual workers could, he said, greatly aid this investigation, 
hut the most effective assistance would he given by the organization 
of local Boulder Committees. This Committee has been in existence 
for a good many years, and some members of our Society have 
contributed to it the results of their investigations, hut we have 
done nothing in the matter for a long time. Perhaps our new 
Secretary, who is interested in superficial geology, might devise 
a plan by which Mr. Monckton’s suggestion could be carried out. 
Migration of Birds. —The Bev. E. P. Knubley said that Section D 
(Zoology) was anxious to encourage the Corresponding Societies in 
the observation of birds, especially their migration. It was now 
known that the common thrush went backwards and forwards from 
our Islands during about ten months of the year. It was also 
found that the wagtail came regularly along the western coast, but 
was unknown on the east. It was desirable that they should learn 
how long the commonest English birds sat upon their eggs before 
hatching them. Ho one at present could answer that question. 
The subject of the food-supply of birds was also one which might 
well be studied. Fortunately we have an active ornithological 
recorder, although his army of correspondents is not so large as 
could be desired. There is plenty of work for him and them in 
Mr. Knubley’s suggestions, by the carrying out of which our 
knowledge of the habits of birds might be materially increased. 
Anthropological Photographs. —Mr. Sidney Hartland spoke on 
behalf of the Anthropological Photographs Committee, saying that 
the Committee thought that there must be in all parts of the 
country a considerable number of photographs of this kind which 
were of interest to students but were not at present available. 
They wanted photographs of prehistoric stone monuments, stone 
implements, primitive pottery, and of objects connected with local 
superstitions, etc. The existence of objects of this kind in local 
museums was often known only to local men, but the Committee 
wished to make them available for all students of anthropology. 
Corresponding Societies. —Some points with regard to the relation 
of these with the British Association were brought forward by 
