Table 1: Wood on Aluminum 130.15 g E 130.00 g 14 0.249 12.8 0.227 14 0.249 12.6 0.224 % diff = 0.00 diff = 0.01 Table 2: Felt on Aluminum = 130.15 g I w E 130.00 g HE 14 0.249 13.6 0.242 Hi + M 15 0.268 14.1 0.251 %% diff = 0.08 % diff = 0.04