420 THE CENTURY, 



Thus, referring to what we have stated under No. 

 57, the purpose named in the present article might 

 be attained by means of two domed or bell-shaped 

 vessels, placed like gasometers, but otherwise immove- 

 able, partially immersed in a pond, or other artificial 

 piece of water ; which being arranged so that, by admit 

 ting a steam pipe into each, the contained air could be 

 driven out thereby, condensation would naturally 

 follow, or might be accelerated ; and one vessel imme 

 diately filling with water, while the other was emptying, 

 the surface of the pond or river would be kept in a 

 continual state of agitation, and the water might be 

 said to &quot; ebb and flow constantly, though 20 feet over.&quot; 



No reason is assigned for proposing this modifica 

 tion of water work, no advantage is pointed out, the 

 Marquis doubtless depending on its apparent impos 

 sibility for its exciting and stimulating inquiry. He 

 knew how the promulgation of such a wonder would 

 have affected his own mind, and never imagined but 

 that the public would feel equally inquisitive. His in 

 comprehensible truths are, however, often denounced, 

 without investigation, as though they were false. 



2 3- 



To fet a Clock in 9 a Caftle, the 1 

 water filling the Trenches about it ; 2 

 it 3 fliall fhew by ebbing and flowing 

 the Hours, Minutes and Seconds, 

 and all the comprehenlible motions 

 of the Heavens, and Counterlibation 4 

 of the Earth, according to Copernicus. 



9 as within a. MS and T. and the. 2 about it shall show the hours, 



minutes, and seconds by ebbing-. 3 which for it. P. 4 couutcrlibration. 



