[_Fine forms from Greece_. l. 342. In real stones, or in paste or soft
coloured glass, many pieces of exquisite workmanship were produced by
the antients. Basso-relievos of various sizes were made in coarse brown
earth of one colour; but of the improved kind of two or more colours,
and of a true porcelain texture, none were made by the antients, nor
attempted I believe by the moderns, before those of Mr. Wedgwood's
manufactory.]


2. "HENCE sable COAL his massy couch extends,
350 And stars of gold the sparkling Pyrite blends;
Hence dull-eyed Naphtha pours his pitchy streams,
And Jet uncolour'd drinks the solar beams,
Bright Amber shines on his electric throne,
And adds ethereal lustres to his own.
355 --Led by the phosphor-light, with daring tread
Immortal FRANKLIN sought the fiery bed;
Where, nursed in night, incumbent Tempest shrouds
The seeds of Thunder in circumfluent clouds,
Besieged with iron points his airy cell,
360 And pierced the monster slumbering in the shell.


[_Hence sable Coal_. l. 349. See additional notes, No. XXIII. on coal.]

[_Bright Amber shines_. l. 353. Coal has probably all been sublimed more
or less from the clay, with which it was at first formed in decomposing
morasses; the petroleum seems to have been separated and condensed again