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from the wood of the stem passes up 

 the pith and wood of the twig or new 

 branch into the stalky parts of the leaves 

 and buds, thence into their spongv porous 

 parts, and descends thence through the 

 bark of the twig to the island of bark. 

 Grew shows us that the vessels (the tracheae) 

 of the wood are prolonged into the woody 

 fibrous or stalky parts of the leaves and 

 buds. 



I have no doubt that if ever so narrow 

 an isfJunus was left from the continent to 

 the upper part of a branchless island, so 

 as to convert the island into a peninsula, 

 the isthmus would form a conduit for the 

 descending sap from the continent, and 

 new growth would be deposited round the 

 whole scar of the isthmus and peninsula, 

 as well as of the continent. 



LOKDOK : 



Printed by A. SpoxTiswoonr. 

 New- Stifc-ct- Square. 



