RMW24HK0–Archive image from page 243 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana0402todd Year: 1849 1028 THORAX. TABLE A.—Relative Lengths and Weight of, and Area of Thoracic Space encompassed by, the respective Ribs, including the Space made up by the Sternum and Costal Cartilages. Rib. Absolute Length. Chord Length. Versed Sine Area Sq. In. Weight, Grains. 1 5-25 2-00 1-75 10- 98 2 9-00 3-75 3-00 27- 134 3 11-00 5-10 3-40 40- 181 4 12-25 6-00 3-50 51- 255 5 12-50 6-90 3-50 57- 308 6 12-60 7-10 3-50 63- 317 7 12-25 7-50 3-30 58-5 391 8 12-10 7-90 3-25 43