Collection of Treatises on the Occult Sciences

...of the two parts, and if you see that the tenth is not alone, leave it; and this is a good beginning, no less useful than necessary, of which we shall give an example:

13 - 11 - 4 - 4 6 13
13 - 12 - 5 - 6 7 13
13 - 16 - 9 - 7 7 14
10 - 11 - 2 - 8 11 4
12 - 7 - 9 - 14 13 7
4 - 5 - 9 - 14 18 12
6 - 3 - 9 11 11 3
5 - 9 11 13 9 12
8 - 10 - 9 7 7 14
9 - 11 10 9 10 10
14 - 13 - 7 6 5 11
14 - 12 - 6 6 3 9

As you shall see below in the square; but first we shall demonstrate the quadrature by error, and we shall form a complete square.

The other numbers which remain are not yet lost; but wishing to make a square of the aforesaid numbers, one has recourse to the remainder as to the tenths, and from there they are not separated from the numbers; one repeats the last numbers as one does the first.