426 



THE CENTURY, 



make but little nojse in the doyng thereof, but you 

 must be sure to set the engine fast, if to thrust from, to 

 be strongly and well backed, and to pull to them it 

 must be strongly bolstered before, sufficient to be of 

 force to scrue the turne.&quot; 



The Venetian arrangement may be described, as 

 shown in the annexed engraving, where A, B, C, is a 



frame, the two upright sides of which D E, are pro 

 vided with a series of clicks, appearing in the drawing 

 like the serrated edge of a saw, and each is so placed 

 secured by a pin on which it moves, as always to in 

 cline to fall outwards. F, F, is a long lever, having a 

 stout short cross bar in the centre, and is represented 

 on the point of taking up on a click at a, while it leaves 

 one on the opposite J, such being the to and fro 

 motion required, thereby losing &quot; no time in motion or 

 strength.&quot; 



