Vol. IT. 



Thilos . Trans. 



ri . iin. 



Fig.l. 



Fi^.2. 



Fuj.3 



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Fig. 6, 



Mutiof Sc £it/jeii CcT 



Fublishtul bv CSi'R.BaMwiiv.oriren' nvlthje Sttvet.Londo/L ISO I . 



