Flg:l P .7S. 



Fig: 6. p. 89. 



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AA.HB.Sides 

 da<. bb. Fredomirumt rippl&.TfiA dfftizd; 

 Jji/tfs shew the dtrtcfooTv of'flotttuiq 

 Ttodits tocantiy parallel, ~to die, sia 



6'ecti-arv 



Fig:7. Section; p. 89 



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Fr SchoockladL 1 : Edmburgk. 



