The ferrotype and how to make it - The Grian Press

8ILVEB. 69
CHAPTER YIl.
SILVER. J
"This metal may be termed a photographic
st)ie qua no7i, for it is more than propable that,
but for its existence, all the interesting phenomena
connected with photography would never
have been observed."
Among the various metals, silver holds the
second place in value and usefulness. It is also
regarded as one of the noble metals, because of its
resistance to the action of atmospheric air and of
fire. It is described as a soft, white, metallic
element, very malleable and ductile, and capable
of a high polish. Its specific gravity is 10.8, or
nearly eleven times as heavy as water. It occurs
pure in nature, and also in combination with
sulphur, arsenic, etc., and with ores of lead,
co]>j)er, and gold. It is found in veins, rarely in
beds, in crystalline slate rocks, gneiss, mica slate,
hornblende, slate, granite, syenite, porphyry.
It is mined extensively in Norway, Sweden,
Saxony, Bohemia, Hungary, Transylvania, Si-
beria, the Hartz, Baden, Tyrol, France, England,
Chili, Peru, Mexico, and in many parts of the
United States. Among the many celebrated