Ex. 9.

Half Joint 107

Fig. 1

Half Joint 108

Fig. 2

Half Joint 109

Fig. 3

Half Joint 110

Fig. 4

Half Joint 111

Fig. 5

Half Joint 112

Fig. 6

Half Joint 113

Fig. 7

Half Joint 114

Fig. 8

Half Joint 115

Fig. 9

Half Joint 116

Fig. 10