260 



BOOK VII. 



The other method of making needles is as follows : 



Copper. 



Silver. 



Semunciae Sicilici 



I 



1 I 



2 



2 I 

 3 



3 i 



5 

 6 

 6 



7 



7 

 8 



8 



9 

 9 



10 

 10 

 ii 



ii 



12 

 12 



13 

 13 

 14 



14 

 15 

 15 



So much for this. Perhaps I have used more words than those most 

 highly skilled in the art may require, but it is necessary for the understanding 

 of these matters. 



I will now speak of the weights, of which I have frequently made mention. 

 Among mining people these are of two kinds, that is, the greater weights and 

 the lesser weights. The centumpondium is the first and largest weight, and of 



