BY S. PRANK AARON. Thalessa. of boring of Tremex. The Thalessa drill. Luminous Projectiles. The pigeon horntail (Tremex columba) boring in wood. The Tremex drill contains tw gouges and two saws., scientific american, 1908-12-12


BY S. PRANK AARON. Thalessa. of boring of Tremex. The Thalessa drill. Luminous Projectiles. The pigeon horntail (Tremex columba) boring in wood. The Tremex drill contains tw gouges and two saws., scientific american, 1908-12-12


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