raised with squared stones, the joints of which are to be 
as long as possible, in order that the middle stones may 
be well tied in. The inside of the wall is then filled with 
rubble or masonry ; and on this, even a tower might be 
erected. When this is completed, the arsenals are to be 
constructed chiefly with a northern aspect; for if they 
are to the south, the heat will generate and nourish the 
rot, the worm, the ship worm, and other noxious insects; 
and timber should be sparingly used in these buildings on 
account of fire. No rule can be given for the size, but 
they must be suited to receive the largest ships, so that, 
if drawn ashore, there may be plenty of room for them. 
In this book, as far as it has occurred to me, I have 
treated of the public buildings necessary for the use of a 
city : in that following, I shall treat of the convenience 
and symmetry of private houses.