400 THE CENTURY, 



8. 



A way how to level and fhoot 

 Cannon by night as well as by day, 

 and as directly; without a platform 

 or meafures taken by day, yet by a 

 plain and infallible rule. 



[_To Level Cannons by Night.~] In 1587 was pub 

 lished, &quot; The Arte of shooting in great Ordnaunce&quot; by 

 William Bourne. Among other matters in the table 

 of contents are the following : 



44 The 10th Chapter showeth how to mount a mortar 

 piece, for to lay the shot at any distance appointed. 



44 The 13th Chapter is, how to give level at a mark 

 upon a hill or valley with a quadrant. 



44 The 24th Chapter is, how for to batter the walls of 

 any town, as well by night as by day. 



44 The 25th Chapter doth declare how to plant ord 

 nance by night, to batter the walls of any town, or 

 displace any ordnance in any bulwarks, or any such 

 other like, as well by night as by day.&quot; And 



44 The 26th Chapter doth declare how for to keep a 

 haven, or river, on the sea coast, for to sink a ship, as 

 well by night as by day in all points.&quot; 



On the subject of levelling great guns, Fludd s 

 44 Historia Macrosmi,&quot; 1618, would afford abundant 

 suggestions, with three copper-plate engravings, show 

 ing the operation of using the quadrant. 



9- I 



An Engine, portable in ones 

 Pocket, which may be carried and 

 fattened on the infide 4 of the great- 



4 the side. 



