408 



THE CENTURY, 



at anchor, the engine may be used for loading or 

 unloading.&quot; 



He made this invention one of the four subjects in 

 his Patent of 1661 (see Appendix B), which again varies 

 the reading ; but this last plainly indicates the motive 

 power as having been a mill. He proposes in his patent 

 specification : &quot; To make a boat that roweth, draweth, 

 or setteth even against wind or stream, yea, both, and to 

 any part of the compass which way soever the stream runs 

 or wind blows, and yet the force of the wind or stream 

 causeth its motion, nothing being required but a steers 

 man ; and whilest the boat stayeth to be loaded or 

 unloaded, the stream or wind shall perform such work 

 as any water-mill or wind-mill is capable of.&quot; 



Among the Harleian MSB. in the British Museum, 

 there is an Italian book of sketches on parchment, No. 

 3281, attributed to the 15th century, entitled, &quot; Deli- 

 neationes Machinarum ;&quot; from one of the pen and ink 

 drawings of which the annexed engraving is a reduced 

 copy. It is a paddle boat of a very primitive form, to 

 be operated by men working at two crank handles. 

 The Marquis seems to have had a very similar idea, 

 only employing the mechanical arrangements of a 

 suitable wind or water-mill. 



