412 THE CENTURY, 



it is a Fort or Caftle they shall be 

 unanimoufly fteered, and effectually 

 be driven by an indifferent ftrong 

 wind. 



[A Sea-sailing Fort.] Vitruvius, Vegetius, and 

 many ancient writers supply a variety of schemes to 

 direct an inventor s ingenuity. The idea of such a 

 construction, to divide into three or more sailing vessels 

 is likewise suggested, in many early designs, although no 

 doubt very different in some details. But the peculiarity 

 hitherto unnoticed, of the present invention, consists in 

 the propelling and steering by means of an artificial 

 current of air. It is very clear that the Marquis had 

 discovered some pneumatic mode of propulsion. There 

 is no inconsistency in the idea of the same means 

 being adapted for both steering and propelling alter 

 nately. Even within the last few years extensive ex 

 periments have been made, in which air-pumps were 

 used to compress the air beneath an inclined plane 

 under the stern, which in flowing upwards gave 

 motion to the vessel. 



How to make upon the Thames 

 a floting Garden of pleafure, with 

 Trees, Flowers, Banquetting-Hou- 

 fes, and Fountains, Stews for all 

 kind of fishes, a referve for Snow 

 to keep Wine in, delicate Bathing- 

 places, and the like ; with mufick 

 made with 5 Mills : and all in the 



5 by for with. MS. and P. 



