Annual report of the City Engineer . \E Scale IJ4-1 PLATE Vn. Stone &^Wl3 s t e Engineeuinc; Dkiautment. 67 ; ;i whole the results obtained were not sufticiently definite to w;iiT;inta (Utfiinination as to wliedier or not iron i)ipes which are slightly cor-roded have been subjected to electrolytic inlluences. HaU; of DclcrioriUioii, due to Elcctruli/sis. In j)la( where elec-trolytic action is slowly takini:; place on ac(;ountof the ellect of the return currents from the Street Railway system, it isimportant to determine as accurately as jjossible the actual rate of decaydue to this cause
Annual report of the City Engineer . \E Scale IJ4-1 PLATE Vn. Stone &^Wl3 s t e Engineeuinc; Dkiautment. 67 ; ;i whole the results obtained were not sufticiently definite to w;iiT;inta (Utfiinination as to wliedier or not iron i)ipes which are slightly cor-roded have been subjected to electrolytic inlluences. HaU; of DclcrioriUioii, due to Elcctruli/sis. In j)la( where elec-trolytic action is slowly takini:; place on ac(;ountof the ellect of the return currents from the Street Railway system, it isimportant to determine as accurately as jjossible the actual rate of decaydue to this cause. Wheriithe action is marked, occasional insi)ections will, of course, givea rough idea of this; but iu the majority of places throughout the cityof IJoston deterioration is not taking place rapidly enough to make this])racticable, so that it seemecl desirable to devise some means of actuallydetermining the rate at which tiie metal is being taken away from any])articular length of pipe. Witli this in view, the iipparatus shown inriate VI. was devised. T
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Keywords: ., bookauth, bookcentury1800, bookdecade1860, booksubjectpublicworks
