Deductions Concerning the Air Bladder and the Specific Gravity of Fishes.
Washington DC: Government Printing Office, 1922. 4to. 121-126 pp. Corners are lightly bumped and worn. Rear edge of front cover is lightly browned. Front cover has two vertical creases and some light staining and stamp from previous owner. Rear cover has light rubbing/soiling and two vertical creases. Paper addresses the primary function of the air bladder in fish as it relates to specific gravity. Very Good Pamphlet (Item ID: 45842)