Mr. Hill Corrects an Error.
liter FIRE AND WATER:
In the haste of closing the discussion on my paper read bere the American Society of Civil Engineers, at the last anal convention, an important statement by Prof. W. P. ason, which I think should be corrected, was entirely overked. In his discussion of the paper, Prof. Mason says, age 167) “Consider fora moment what the Altoona filters for that city during the Hamburg cholera epidemic of 92. The Altoona water was taken from the Elbe river, at joint below the outfalls of sewers carrying the cholera inled sewage of 800,000 people. Yet Altoona had no cholera scept imported cases) while Hamburg was scourged by it.” ter the epidemic of 1892, Dr. Robert Koch, the great auril on this disease, made a full and careful investigation the history of cholera at Hamburg and vicinity, with the plowing results so far as Altoona was concerned. The mberof cholera cases occurring in Altoona was 572, of ich 400 were said to have been contracted in Hamburg, ving 172 purely local cases, while Prof, Mason states there i re none at all.
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