[Chap. XXXVI ORIGIN OF PLANTS USED BY MAN 429 



Many others were used as sources of material for weaving, medicine, 

 and personal equipment (Figs. 201 and 202). 



Fig. 200. Woodland Indians collecting and boiling maple "sap" as a source of 

 sugar. Photo from American Museum of Natural History, New York. 





Fig. 201. Birch bark industries of North American Indians. Photo from American 



Museum of Natural History. 



