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A NEW GALLERY OF PEACTICAL SCIENCE. 



" Is there not ar through all the works of Nature ?" 



LADIES and Gentlemen of a mechanic turn, we can introduce 

 you to a new theatre of exhibition, where ingenious mechan- 

 isms, arts, and manufactures are in daily operation. There, 

 without payment of a shilling, you may look upon diving- 

 bells and balloons see bodies propelled through water by the 

 strokes of an internal piston examine the models of a life- 

 boat and a raft observe the effect of cleverly-constructed 

 buoys behold in practice, or in their finished productions, 



