On the magnet, magnetick bodies also, and on the great magnet the earth: a new physiology, demonstrated by many arguments & experiments
History
On the magnet, magnetick bodies also, and on the great magnet the earth: a new physiology, demonstrated by many arguments & experiments
Magnetism -- Early works to 1800
diamonds, since diamond surpasses all in splendour and hardness, because
gold excels in splendour, gravity, and density, being invincible against
all deterioration. Iron as dug up is therefore, like iron that has been
smelted, a metal, differing a little indeed from the primary homogenic
terrestrial body, owing to the metallick humour it has imbibed; yet not so
alien as that it will not, after the manner of refined matter, admit
largely of the magnetick forces, and may be associated with that prepotent
form belonging to the earth, and yield to it a due submission.
* * * * * {25}
CHAP. VIII.
In what countries and districts iron
_originates._
Plenty of iron mines exist everywhere, both those of old time recorded in
early ages by the most ancient writers, and the new and modern ones. The
earliest and most important seem to me to be those of Asia. For in those
countries which abound naturally in iron, governments and the arts
flourished exceedingly, and things needful for the use of man were
discovered and sought after. It is recorded to have been found about
Andria, in the region of the Chalybes near the river Thermodon in Pontus;
in the mountains of Palestine which face Arabia; in Carmania: in Africa
there was a mine of iron in the Isle of Meroe; in Europe in the hills of
Britain, as Strabo writes; in Hither Spain, in Cantabria. Among the
Petrocorii and Cubi Biturges[77] (peoples of Gaul), there were worksteads
in which iron used to be wrought. In greater Germany near Luna, as recorded
by Ptolemy; Gothinian iron is mentioned by Cornelius Tacitus; Noric iron is
celebrated in the verses of poets; and Cretan, and that of Euboea; many
other iron mines were passed over by these writers or unknown to them; and
yet they were neither poor nor scanty, but most extensive. Pliny[78] says
that Hither Spain and all the district from the Pyrenees is ferruginous,
and on the part of maritime Cantabria washed by the Ocean (says the same
writer) there is (incredible to relate) a precipitously high mountain
wholly composed of this material. The most ancient mines were of iron
rather than of gold, silver, copper or lead; since mainly this was sought
because of the demand; and also because in every district and soil they
were easy to find, not so deep-lying, and less beset by difficulties. If,
however, I were to enumerate modern iron workings, and those of this age
and over Europe only, I should have to write a large and bulky volume, and
sheets of paper would run short quicker than the iron, and yet for one
sheet they could furnish a thousand worksteads. For amongst minerals, no
material is so ample; all metals, and all stones distinct from iron, are
outdone by ferric and ferruginous matter. For you will not readily find any
region, and scarcely any country district over the whole of Europe (if you
search at all deeply), that does not either produce a rich and abundant
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