250 PHILOSOPHICAL TRANSACTIONS. ' [aNNO J 685, 



in the bottom, as I. ILL a slender pipe, hidden by the chimney-board B B, 

 by which the tumbler A A communicates with the pump or bellows M M. Which 

 pump or bellows is well shut ; and having no other aperture, except through 

 the pipe ILL. These are put in some secret place, where a person may play 

 them, and not be seen. N N a slender pipe, making a communication between 

 the glass A A, and the crown F F ; this pipe reaches near to the cover of the 

 crown, that the water contained in it may not run down by that aperture. 

 EE the factitious coral, hollow within, but shut at the bottom, and open at 

 the top. D D D D two crooked pipes, soldered to the sides of the coral EE^ 

 so that the water running down the coral may spout out through the holes DD. 

 O O a pipe concealed in the coral E E, passing through the bottom, where it 

 must be well soldered, and reaching near to the bottom of the rock C C. PP 

 a pipe to convey the water from the glass G G into the rock C C ; and is well 

 soldered to the cover of the rock. Q a valve working by a spring at the bottom 

 of the pipe P P, to keep the water, that gets in that way, from returning back. 

 R another valve at the top of the pipe O O, that the water getting up that way, 

 may not fall through the same. 



Now it is plain, that the rock CC being filled partly with water, and partly 

 with air; if we open the bellows MM, the air from the crown FF must run 

 through the pipe NN, into the tumbler A A ; and thence through the pipe 

 ILL, into M M, to fill the vacuity made there : the air in the crown F F be- 

 ing thus rarefied, it gives liberty to the air in the rock C C to rarefy also, by 

 driving the water through the pipe OO: the water, being got up into the 

 crown FF, runs down the coral EE, and through the crooked pipes DDD, 

 spouting out at their upper apertures, and from the shells H H, falls upon the 

 rock CC. — If we afterwards shut the bellows MM, the air in their vacuity 

 must run back into the tumbler A A, and press upon the water at the top of 

 the rock C C : but the air in the rock having been rarefied, its spring is 

 not sufficient to resist this pressure, so that the water is forced into the 

 rock through the pipe PP. And by thus opening and shutting the bellows 

 MM, the water must constantly circulate as above described. 



As for the uses which this way of raising water may be applied to: the 

 glasses, being merely to conceal the secret, must be left out; and there may be 

 made several receptacles above one another, to receive the water raised ; and 

 there should be as many bellows, all to communicate with one receptacle : these 

 bellows should be moved by an axis, so that when the first is open, the second 

 should be shut ; the third open, the fourth shut ; and so alternately : by this 

 means, the first or lowest receptacle would give the necessary supply of water 

 to the second, the second to the third, the third to the fourth, &c. till the 



