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:3 T '.'( 229^) °c*. n / FOURTH GENUS.' CLAY GENUS. FIRST SPECIES. 1 ■A Jafper. \ *■ • 1 Jafpis .—Werner. . « "Werner divides this fpecies into fix fubfpecic*, viz 1. Egyptian jafper, 2. Striped jafper, 3. Porce lain jafper, 4. Common jafper, 5. Agate jafper, and 6* Opal jafper. FIRST