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Ch. 8: Synthetic Gemstones

Ch. 8: Synthetic Gemstones Page of 296 Ch. 8: Synthetic Gemstones Text size:minus plus Restore normal size   Mail page  Print this page
226                       PRECIOUS STONES.
Instead of employing powerful currents, such as were used to produce decomposition, he applied to his purpose very feeble currents, and the results ob­tained surpassed his expectations.
The simple apparatus which he used is shown in Fig. 90. It is a tube curved in the form of the letter U. The curved part is filled with clay, to prevent the liquids contained in the branches from
flowing together, without interfering with the pro­duction of molecular actions and transports. The two liquids are, moreover, placed in direct com­munication by means of a metallic wire.
One of the substances reproduced by M. Bec-querel was the sulphide of silver crystallized.
In the left branch of his tube he placed a satu­rated solution of nitrate of silver, in the right branch
Ch. 8: Synthetic Gemstones Page of 296 Ch. 8: Synthetic Gemstones
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