By the Brig Ketly Capt. Osborne I have sent you the model of a machine the result of a thought occuring to me some time ago which I have realised in the present form. It is that of an horizontal windmill applied to three pumps——this application as one of the most useful for raising water from lands, draining mines or pumping ships in distress at sea; but if the first movement be found effective it may be applied to all the various uses of other windmills, without the inconvenience of turning the house or frame to the wind. I could mention some further objects that have occured to me on the subject but I daresay they will present themselves to you; when you have examined the model if you think the invention of sufficient importance I would thank you to have it shewn to the Society of Arts or made public in any way you may think it merits. The necessity of regulating and stopping the motion of the mill will no doubt occur to you; that part of it I have omitted at present from want of time, but it is very easy, nearly as much so as that of stopping a water mill and I shall have it fixed to another model I am preparing for the Philosophical Society here. Your sentiments on this invention at a leisure moment will be very gratifying and esteemed a particular favor by your friend