248 British Association Notes and Comments. 
Sheppard, ‘ Hull’s supply was extracted from the water of 
the River Hull and passed through filter beds at Stoneferry. 
A serious epidemic at Beverley was followed by a much more 
serious outbreak at Hull, for, while the filter beds clarified 
the turgid waters, they were unable to extract the bacteria. 
Since then Hull has bored into the chalk for its water supply.’ 
The anglers first drew attention to the fact that sections of 
the stream, which once were prolific, were almost useless 
for angling purposes. It was recorded that a man ‘ who 
gave his age as 76 years, stated that the most interesting day 
of the week on which to view the canal at Whinhill is Tuesday, 
as on that day “ blood and suds ” come down the stream ; 
blood from the slaughterhouses at Driffield, Tuesday being 
killing day ; and “ suds ” from the washing of clothes which 
takes place on the same day of the week.’ 
APPEAL TO FISHERY BOARD. 
The members of the various angling societies in the district, 
realising that the changes in the river were resulting in the 
fish gradually disappearing, appealed to the Yorkshire Fishery 
Board, which in turn appealed to the Ministry of Agriculture 
and Fisheries. That Board sent its scientific representative, 
Dr. E. C. Jee, to make inquiry, and eventually a local 
committee was formed to investigate. Periodical examina- 
tion was made of the state of the miscroscopic fauna and flora 
of the river, as upon these the fresh water snails, worms, etc., 
fed, which in turn supplied food for the fish. Samples have 
been periodically taken at various points in the stream. 
The effect of sewage, gasworks affluents, and other sources of 
contamination were apparent and having obtained sufficient 
scientific evidence to show that these sources of pollution had 
a detrimental effect upon the health of the river fauna, and 
were therefore likely to be detrimental to the health of human 
beings, interviews were arranged with the various parties 
concerned. As a result, improvements have been made in 
the method of treating the sewage, and in preventing poisonous 
gas liquor from Ending its way into the river. 
CAGED FISH. 
Experiments were made to ascertain the effect of the 
polluted water upon the fish in different parts of the river. 
Large numbers of different species were secured, placed in 
specially designed cages at selected points of the river, and 
periodically examined. So far, however, the experiments 
have largely been of negative value. ‘ As years go on,’ 
declared the speaker, ‘ increasing population on the banks 
of the river, and on its tributary streams, together with the 
The Naturalist 
