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  • A microscopic examination of the water supplied to the inhabitants of London and the suburban districts. Illustrated by coloured plates exhibiting the living animal and vegetable productions in Thames and other waters ... : with an examination, microscopic and general, of their sources of supply ... / by Arthur Hill Hassall.
  • A microscopic examination of the water supplied to the inhabitants of London and the suburban districts. Illustrated by coloured plates exhibiting the living animal and vegetable productions in Thames and other waters ... : with an examination, microscopic and general, of their sources of supply ... / by Arthur Hill Hassall.