1. We found that birch bark could serve as paper.

2. These shoes were commonly made from Birch bark, but they could also be made from linden or lime-tree bark.

3. Also, among ?tzi's possessions were berries, two birch bark baskets, and two species of polypore mushrooms with leather strings through them.

4. I put the last of my birch bark on the fire and fanned it into life.

5. In Finland purists insist that only birch bark should be added.

6. The birch bark culture is an component part of the primitive human culture.

7. Detailed chemical and microscopic analysis on the leather legging, some 32 inches long, reveal it was made of goatskin, and tanned using birch bark and other plants.

8. Objective To study the antitumor effects of the extraction of birch bark(EBB)and its influence to the immune function of the tumor-bearing mice.

9. No tracks but my own are stitched into the dusting of fresh snow, white as birch bark, that fell during the night.

10. A simple procedure is described for the simultaneous extraction and determination of betulin and betulinic acid in white birch bark; 2.

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11. They instructed the new-comers in their agriculture and woodcraft, introduced them to maize, beans, squash, maple sugar, snowshoes, toboggans, and birch bark canoes.

12. Nomadic hunting nationalities in the north of China, such as Oroqen, Ewenki, Hezhen , all have a long history in using birch bark.

13. While written manuscripts were used for teaching in medieval times, they were written on birch bark or palm leaves, until the advent of the printing press from the 16th century.