Column,Contents 1,"Serial number of secondary branch " 2,"Length, base of primary to secondary branch (inch)" 3,"Diameter of secondary branch (cm) " 4,"Length of secondary branch (inch) " 5,"Angle of branch from the main rib (deg) " 6,"Weight of secondary branch (gm) " Group A 1 3.0 0.5 15.5 75 21.7 2 5.5 0.5 10.0 80 11.9 3 6.5 0.3 5.5 601.2 4 10 0.45 7.0 707.9 5 10 0.5 8.5 658.6 6 12.5 0.45 10.5 707.0 7 13.1 0.28 6.3 603.5 8 14.3 0.19 4.8 702.2 9 14.9 0.16 5.5 501.4 10 15.6 0.16 5.8 702.4 11 16.0 0.22 5.7 502.0 12 12.5 0.29 11.5 07.7