NO. I GROWTH LAYERS IN TREE BRANCHES — CLOCK ET AL. 



93 



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r-r^vjv^w^^ 



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Fig. 32. — Z6"C J-7-&. The increment for 1935 in symbol and cell structure. 

 Multiplicity and a midincrement curtain. Sequence shows : see followed by dw 

 curtain; 2 see. 



Fig. 33. — TTC 12-g-h. Increment for 1937. Multiplicity; arc; curtain. 

 Sequence : Spots of natural frost ; psce ; s arc ; msce ; see and msce curtain ; see. 



