414 THE CENTURY, 



may have been facilitated by the machine resting on 

 two central pivots. But it must have been of con 

 siderable size to produce an efficient hydraulic pressure 

 engine to give forth snow and ice. The thunder, &c., 

 would depend on plans well understood for producing 

 stage effects, and their introduction here, with the 

 music of birds, &c. [see Article 46.] is similar to other 

 automatic arrangements which were the wonder and 

 delight of that age, and a much later period. 



In 1755, an engine of peculiar construction, to raise 

 water from an Hungarian mine, was erected by M. Hoel, 

 at Chemnitz, which generated intense cold as the water 

 and air rushed out together, under great columnar pres 

 sure, causing the formation of artificial hail, projected 

 with amazing force 5 the effect being very analogous 

 to the suggestions offered by the present articles, Nos. 

 17 and 18. 



I9 . 

 A little engine within a Coach, 



whereby a child may ftop it, and 

 fecure all perfons within it, and the 

 Coachman himfelf, though the hor- 

 fes be never fo unruly 9 in a full 

 career ; a child being sufficiently 

 capable to loofen 1 them in what 

 pofture foever they should have put 

 themfelves, turning never fo short ; 

 for a child can do it in the twink 

 ling of an eye. 



9 and running. J unloose. P. 



[A Coach-saving Engine.~\ We have two other 

 readings of this article ; the first is the 5th article in 



