Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . Fi:j. 120.—Tracheal System of Cockroach. Top and front of head seen from without. X 15. Fig. 119.—Tracheal System of Cockroach. Theventral integument and viscera removed toshow dorsal tracheal communications. X 5.

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Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectscience