WITH NOTES. 419 



in fome private room or place out 

 of fight, and a competent diftance 



from it. 



[An ebbing and flowing Biver.~\ In reference to this 

 invention Mr. Partington has quoted Peter Bogaerts 

 ingenious method of a canal lock, so contrived that, in 

 a model, a weight of seven pounds was made to raise 

 ten hundred weight of water more than four feet in a 

 few seconds. 



But still the process of ebbing and flowing is not 

 made out ; it does appear, however, that its operation 

 requires the constant services of a boy or other 

 attendant, probably to keep alternately opening and 

 closing certain sluice arrangements, placed somewhere 

 concealed from view 5 the whole affording a water- 

 work to amuse and surprise, and forming a variety on 

 the usual strange schemes attached to grottos, caves, 

 &c. spouting water in every variety of form. 



See further the comments on article No. 57, which 

 very probably includes the principle here employed by 

 the Marquis. 



There is no communication in this article of fact s 

 requisite to direct an engineer or inventor in the ad 

 justment of any special kind of machinery to obtain the 

 desired ebbing and flowing river ; which is a novelty, 

 in this respect, peculiar to the Marquis of Worcester s 

 ingenuity. He was evidently not copying or improv 

 ing any anterior system of water- work. The next 

 article is but an application of this new system ; and 

 it is not until he has taken us through descriptive hints 

 of thirty-three totally different designs or devices, that 

 in No. 57, he offers &quot; A constant water-flowing and ebbing 

 motion.&quot; We think the three may be taken together, 

 that is, No. 57, refers to the principle and mechanism, 

 of which Nos. 22 and 23, are mere simple applications. 



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