1911 Encyclopædia Britannica/Ground-pearl

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1911 Encyclopædia Britannica, Volume 12
Ground-pearl
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17070761911 Encyclopædia Britannica, Volume 12 — Ground-pearl

​GROUND-PEARL, the glassy secretion forming the pupacase of coccid insects of the genus Margarodes, belonging to the homopterous division of the Hemiptera.

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