STEAM NAVIGATION. 49

by applying one of my boilers and its connections to move the pieceC up and down forcibly. The wheels E and F are turned backwardand forward. By this operation the ropes or chains seen in dottedlines, from their connection with the wheel E, move backward andforward the box G H, in which is a valve at G; and the carriage LI,which moves in grooves, draws forward the box with little resistanceby the valve at G opening; but when it is drawn towards the stern ofthe boat, the water enclosed within it by the shutting of the valve, pre-vents the box from moving back by its weight, whilst the boat isdrawn forward by the ropes connected with the wheel E: these ropesmove round sheaves in the pieces of timber KL."The carriage(I)has poles connected with it which hang on swivels, and act upon thebottom in shallow water.

“ Fig. 19, the section of a boat with A B, a trunk, in its bottom,

James Rumsey’s Steam Boat, 6th Nov. 1788.

which has a valve C communicating with the water that floats her.M and N is a eylinder screwed on the trunk A_B, and has its pistonL connected with the bolt I, to which I apply one of my boilers, bywhich means water is drawn through the valve C and trunk A B,and is discharged through the valve D, which causes the boat tomove forward.”

In 1790, James Rumsey obtained another English patent forpropelling vessels, the title of which is for“ his new inventedmethods of applying Power of Water, of Air, and of Steam, eitherseparately or together, as circumstances may require, to the purposesof milling, and giving useful motions or effects to various kinds ofMachines, and for the advantageous management of Shipping and

1788,

1790.March 24.