. The Artizan. orementioned, is by means of rudders raised flush with tho skin of thevessel wdien not in use. and which is shown at Fig. 1. Plato 335. Twoor more of those rudders may bo placed at equal and opposito anglos,with a straight line drawn through the centre. SO that when either ono islowered into tho water it will tend to cause the vessel to revolve, or, in otherwords, will stoer it in tho required direction. In this ease tho curved pipesand tho horizontal slido valve may be dispensed with, and the eccentricupon the centre shaft of the pilot house may. if desired, he mado to workthe
. The Artizan. orementioned, is by means of rudders raised flush with tho skin of thevessel wdien not in use. and which is shown at Fig. 1. Plato 335. Twoor more of those rudders may bo placed at equal and opposito anglos,with a straight line drawn through the centre. SO that when either ono islowered into tho water it will tend to cause the vessel to revolve, or, in otherwords, will stoer it in tho required direction. In this ease tho curved pipesand tho horizontal slido valve may be dispensed with, and the eccentricupon the centre shaft of the pilot house may. if desired, he mado to workthe rudders. This plan appears to have some advantages over the curvedpipe arrangement so far as regards steering, though it would evidently bemuch less effective for causing the vessel to revolve rapidly. Perhaps tho simplest method of any out of tho number that Mr. Elderhas proposod for handling a circular vessel, is that shown in tho annexedwoodcut- In this ease tho water is taken into the turbine at its eiroum-. oo 170 THE ARTIZAN. [AuorsT, 1, 1868. ference, through suitable pipes, and discharged through the centre to whichis fitted a curved pipe which discharges the water horizontally, or nearly so,under the centre of the vessel. This discharge pipe is free to revolve, stuffing-box joints being made between it and the turbine, and again where it passesthrough the hull of the vessel. Upon this pipe is fitted a spur wheel, intowhich a pinion upon an upright shaft is geared, while upon the upper endof this shaft a similar pinion gears into a similar wheel fitted round thebase of the pilot house, These wheels and pinions having precisely thesame number of teeth respectively will, of course, impart a preciselysimilar motion to the pilot house and the discharge-pipe. Now, by havinga line of sight in an exactly opposite direction to the water jet, andbringing this line to bear upon any object, the vessel will travel towards it;or, conversely, supposing a man to stand in the pilot hou
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