Issue 15 and Volume 24.

ELECTROLYSIS. REPORTS ON THE ELECTRICAL ACTION ON WATER PIPES, CITY OF DAYTON, OHIO. (Mr. Brown’s report continued.) It is my opinion that all cast iron pipes showing a pressure in excess of three volts are more or less injured ; the extent of this injury can be determined by investigation. Reference to the map will show that this covers the pipes on Fifth street from Ludlow to Mound ; on Ludlow street from Franklin to Washington ; on Washington street from Ludlow to Germantown; and on Germantown street from Baxter to Euclid. We have already found some exceptions, which show that the depth of the pipe below the rails plays an an important part; for instance, at the corner of Boulevard and Fifth. the pressure is tour and a half volts at time of heavy load. The pipe was exposed at this point, and was found to be seven feet…

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