distinguishes three very different species of iron: ‘1st
Avicenna, in his fifth book _De Anim_, according to Roger Bacon,
distinguishes three very different species of iron: ‘1st. Iron which is
good for striking or bearing heavy strokes, and for being forged by hammer
and fire, but not for cutting-tools. Of this hammers and anvils are made,
and this is what we commonly call _Iron_ simply. 2nd. That which is purer,
has more heat in it, and is better adapted to take an edge and to form
cutting-tools, but is not so malleable, viz. _Steel_. And the 3rd is that
which is called ANDENA. This is less known among the Latin nations. Its
special character is that like silver it is malleable and ductile under a
very low degree of heat. In other properties it is intermediate between
iron and steel.’ (_Fr. R. Baconis Opera Inedita_, 1859, pp. 382-383.) The
same passage, apparently, of Avicenna is quoted by Vincent of Beauvais,
but with considerable differences. (See _Speculum Naturale_, VII. ch. lii.
lx., and _Specul. Doctrinale_, XV. ch. lxiii.) The latter author writes
_Alidena_, and I have not been able to refer to Avicenna, so that I am
doubtful whether his _Andena_ is the same term with the _Andaine_ of
Pauthier and our _Ondanique_.
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