The   John Mason from Boston has Construckt’d and Compleatd a Boat that will Repell the Streem and move or advance with a Sufficient Velocety—without Sails or Oars. The Above is on a Small Scale and Sd Mason propose’s to fit up or prepare a Shallop for the above purpose provide’d a Subscriber Can Be Compleated to Defray the Expence’s, and Compensate him for his time, trouble and, for the Invention. Sd mason is ready to Shew Your Exelency, the Experiment in private, and hopes that You will keep the knowledge of the princibles, Serceret untill it Can be made known to all the States at one time—Sd Mason Entred Early into the American wars, and has ben very much hurt in person and property. Should he meet Encoragement in the Above propose to turn his attention towards makeg Scylkill Navagable Sir with the Greatest Respeckt Your to Serve