Diversions of a NaturalistLankester, E. Ray (Edwin Ray), Sir
History
Diversions of a Naturalist
Lankester, E. Ray (Edwin Ray), Sir
Natural history
Forty years ago an old lady used to sit in the doorway of her
timber-built cottage in the village of Trimley (where there are the
churches of two parishes in one churchyard), smoking a short clay pipe
and carving bits of amber found on the Suffolk beach into the shape of
hearts, crosses, and beads. She would carve and polish the amber you
had found yourself whilst you joined her in a friendly pipe. You were
sure in those days of the genuine character of the amber, jet, and
agate sold as "found on the beach." Nowadays these things, as well as
polished agates and "pebbles from the beach," are, I am sorry to say,
manufactured in Germany, and sent to many British seaside resorts,
like the false coral and celluloid tortoise-shell which, side by side
with the genuine articles, are offered by picturesque Levantines to
the visitors at hotels on the Riviera, and even in Naples itself.
Nevertheless, genuine and really fine specimens of amber picked up on
the beach and polished so as to show to full advantage their beautiful
colour and "clouding" can still be purchased in the jeweller's shop
at Aldeburgh on the Suffolk coast near the great pebble beach of
Orfordness.
There are difficulties about using the word "amber" with scientific
precision. The fossil resins which pass under this name in commerce,
and are obtained in various localities, including the Prussian mines on
the Baltic, are undoubtedly the product of several different kinds of
trees, and, from the strictly scientific chemical point of view, they
are mixtures in varying proportions of different chemical substances.
The merchant is content with a certain hardness (which he tests with a
penknife), transparency, and colour, and also attaches great importance
to the test of burning a few fragments in a spoon, when, if the
material is to pass as "amber," it should give an agreeable perfume.
Scientifically speaking, "amber" differs from other "resins," including
copal, in having a higher melting point, greater hardness, slighter
solubility in alcohol and in ether, and in containing "succinic acid"
as an important constituent, which the other resins, even those most
like it, do not. True amber thus defined is called "succinite," but
several other resins accompany it even as found in its classical
locality--the Baltic shore of Prussia--and, owing to their viscid
condition before fossilization, may have become mixed with it. One of
these is called "gedanite," and is used for ornamental purposes. It is
more brittle than amber, and contains no succinic acid. It is usually
clear and transparent, and of a pale wine-yellow colour.
Public-domain text, read in full here on John Shaqi.
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