American Vitrified Conduit Company : vitrified salt glazed underground and interior conduits, contractors for complete installation of conduit systems. . m PROVIDENCE, R. of Water-proof Man-hole, by MARK LOWD, Engineer 32 £ s I l 8 - u. C<-3 G oo h Qu i- C ^ 3 AMERICAN VITRIFIED CONDUIT CO. -w*

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Keywords: ., bookcentury1800, bookdecade1890, bookidamericanvitr, bookyear1899