POLLUTIONS MORE SERIOUS THAN WEIRS. 65 
made to contribute specially by a percentage on the cost 
of the works necessary to deal with their refuse. 
Such a measure may appear drastic, but a serious disease 
demands a radical cure. The Hydra of river pollution 
requires a Hercules to end its days, and no half-measures 
will be really effective. Much, however, may be done 
by individual effort; and it is sincerely to be hoped that 
both manufacturers and mine-owners, as well as weir- 
owners, will unite in a real effort to benefit themselves 
as well as the fisheries by removing or abating as far as 
possible the obstacles they have placed in the way of a 
national industry. So long as pollutions exist, the fish 
and the fisheries must sicken or die. For weirs~however 
serious—a remedy short of actual demolition may be 
found ; but for pollutions, if at all serious, nothing short 
of removal will be efficacious. 
