Annual report of the City Engineer . stem,and the question arose immediately as to the amount of damage thatsuch ciurents were doing. The tests made during the past year have confirmed the results ob-tained at first, and we have therefore thought this matter of sufficientimportance to make it an object to conduct special laboratory tests todetermine the probable extent and nature of injury resulting from thiscause. In this citj no well-defined case of serious trouble from the passageof currents through the pipes themselves has been discovered, althoughsome difficulty from electrical disturbanc
Annual report of the City Engineer . stem,and the question arose immediately as to the amount of damage thatsuch ciurents were doing. The tests made during the past year have confirmed the results ob-tained at first, and we have therefore thought this matter of sufficientimportance to make it an object to conduct special laboratory tests todetermine the probable extent and nature of injury resulting from thiscause. In this citj no well-defined case of serious trouble from the passageof currents through the pipes themselves has been discovered, althoughsome difficulty from electrical disturbances has been reported whenmaking connections to the main water-pipe upon Dover street, near theSouth Boston bridge. But tests have so far revealed nothing of other cities we have found serious action resulting from this causeat points where anything in the nature of an electrically insulated jointoccurs. Plate III. shows a section of pipe which was examined under our A ^ 7^ ? PLATEm V V 7 \ -I \ B f-^ Sron e &Wo b s t e r.
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Keywords: ., bookauth, bookcentury1800, bookdecade1860, booksubjectpublicworks
