326 



ANALYSES 



12. Black Bi&ch {Betida lento) . 



Tree ili^hlljr hollow at the base. Diameter eight feet from the base, 17J inches. Mean thickness of the 

 bark, | inch. Number of layers eig-ht feet from the base, 235. Average thickness of each layer, 

 0-03564 of an inch. Growth quite uniform. From 80 to 85 of (he outside layers were taken for out- 

 side wood : thickness 3} inches. 



106-459 



109-68 S. 114-82 S. 



13. Yellow Birch {Betula excelsd) . 



Tree sound. Diameter four feet from the base, 21^ inches. Average thickness of the bark, j inch. Num- 

 ber of layers four feet from the base, 184. Average thickness of each layer, 0-0557 of an inch. 



101-94 



107-304 



104-60 



