APPENDIX A. 



[The following is from Birch s MSS. in the British Museum, No. 

 4459 ; and portions have been quoted in the Commentary, under 

 each article of invention named herein.] 



INVENTIONS OF T E E AELE OF WOECEST? 



The Qvint E ssence of Motion, or a Collection of all kinds of 

 Movements, to wit, C ircular, to & fro ; Perpendicular, upwards & 

 downewards ; side motions, to y e right & left ; straight Motions, fore- 

 wards & backwards with a Circular Vehiculum, to wch any of 

 these, may bee applicable or moveable to all y e points of y e C om- 

 passe : At each of wch, it will bee as powerfull as if it were fixt to 

 one place or C enter. 



All & every of these, by hight of Art, Industry, & Experim* 

 working y e same Individuall & Intrinsecall effect, without disturb 

 ance one to y e other : & yet by these absolutely contrary Motions 

 soe perform d, most strange & incredible E ffects may bee brought 

 to passe, to y e Admiration even of y e greatest Mathematicians. 



The knowledge of these things, rendring all things as feacible to 

 him, y* is Master of this Art, as it is to make a C ircle with a paire 

 of C ompasses, or a straight line, w th a sqvare or Euler. They 

 beeing a direct abstract of Arithmetic!?, contrived by mee. And by 

 y power of those, I have perfected these following Conclusions, w th 

 some hundreds besides all experimented by mee. 



(1) I can render an ordinary Watch, wch beeing once wound 

 up, will goe constantly, during a Mans life, beeing vsed but once in 

 24. houres, & (though oftner look t on :) it is still y e same, & though 

 not look t on for a weeke, still y e same, if not bruised, 



(2) By this I can make a Vessel of as great burthen, as y e 

 Eiver can beare, to goe ag* y e streame, wch y e more rapid it is, 

 y e faster it shall advance, & y e moveable part y* workes it, may bee 

 by one man still guided, to take y e best advantage of y e streame, & 

 yet to steer the boat to any point. And this E ngine is applicable 

 to any Vessell or Boate, whatsoever ; without being therefore made 

 on purpose ; And worketh these effects. It roweth, it draweth, it 

 driveth (: if need bee :) to passe London bridge ag* y e streame at low 

 water : And a boate lying at Anchor, the E ngine may be used for 

 loading or viiloading. 



