182 Proceedings of the Royal Physical Society. | 
Road. This overflow runs under the old Strathblane Road and widens out 
into a small pond. The best place in the overflow lies on the west side of 
the road. 
Many similar “overflows” could be found at Milngavie, which abounds 
in lochs. | 
3. The Allander Water itself makes several basin-lke expansions similar 
to the one already described for its tributary. These were not quite so good — 
because of the great abundance of dipterous larve. The mud improved after 
it had been left for some time under a gently dripping tap. Hydra is of 
great use in keeping the cultures free from crustaceans, and it is significant 
to note that in all good habitats of Amwbw it is invariably found. 
4. On the south side of Glasgow, although only one place has been tested, 
the conditions are very favourable, especially in the neighbourhood south of 
Barrhead, where many overflows from lochs deposit in a more or less level 
part of their course quantities of débris, this debris being oxygenated by the 
constant flow of the water. 
5. The districts around Gartcosh should similarly provide good “ sites.” 
(Issued separately, 4th October 1919.) 
