DESCRIPTION OF A PLAN, ADOPTED FOR CARRYING OFF AN ACCUMULATION OF WATER FROM THE WAREHOUSES, CELLARS, ETC. NEAR THE WET DOCK AT THE PORT OF IPSWICH

G HURWOOD
1843 Minutes of the Proceedings of the Institution of Civil Engineers  
telegraphs was placed ; the wire then descended, and a plate of zinc attached to its extremity was plunged into the mud of the river; a similar plate was attached to the extremity at the north side, and was immersed in the water. The circuit was thus completed by the entire breadth of the Thames, and the telegraphs acted as well as if the circuit was entirely metallic. The peculiar construction of the present signal telegraph, enabled a magneto-electric machine to be substituted for a voltaic
more » ... ted for a voltaic battery. This source of electric action not being subject to cessation or diminution, the attention necessary for keeping a voltaic battery in order, was dispensed with, and the instruments were always ready for action, without any previous preparation. June 13, 1843. The PRESIDENT in the Chair. The following were balloted for and elected :
doi:10.1680/imotp.1843.24674 fatcat:wa6qkypl3jhcjnzd5z4e6ryl6e