COMPARISON OF PLATINUM AND GAS THKK.MOMETKKS. 



115 



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CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO ^> ^* G^ CO ^* tO 4 1 OO ^5 ^^ CO 



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m o^"<M<Mcoco-*io>oi2<o<ot-t t opopopopoDaooooocjoot-ot ooocoi --t ci 



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 o6cbo66ooo6oo6oo66o6o6oo66o666ooO' ; -^-i' ; - 

 IIIIIIIIIIIIIIIIIIIIIIII+++++++++++ 



CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO O "~H CM CO ^* CO t OO O '' CO 

 OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO^rt^ 



J IIIIIIIIIIIIIIIIIIIIIIII+ + + + + + + + + + + 



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