Gutters and mud tanks; Fig. 1 to 4: gutter bridges made of concrete in transverse and longitudinal section; Fig. 5 to 6: Connection K點henausgussrohr in transverse and longitudinal section to the sludge tank; Fig. 7 to 8: connection of the channel in the yard in transverse and longitudinal section; to the mud tank; Fig. 9 to 10: larger gutters made of concrete in transverse and longitudinal section; signed: Aufgen.; u; signed v.; Becker; sheet 8; Becker; W. A. (aufgen. u. gez.); 1869; W. A. Becker: Anleitung zur Anwendung der Cemente. Berlin: ?; 1869