326 



ANALYSES 



12. Black Birch (Betula hnta) . 



Tree slightly hollow at the base. Diameter eight feet from 

 bark, A inch. Number of layers eight feet from the 

 0-03564 of an inch. Growth quite uniform. From 8( 

 side wood : thickness 3| inches 



the base, \7\ inches. Mean thickness of the 

 base, 235. Average thickness of each layer, 

 to 85 of the outside layers were taken for out- 





Bark. 



Outside wood. 



Heart wood 



Potash 



2-59 



7-34 



8-25 



Soda 



1-87 



12-93 



10-30 



Chloride of sodium 





0-10 



0-12 



Sulphuric acid .... 



9-537 



2-61 



4-12 



Carbonic acid - 



37-156 



24-06 



26-44 



Lime ....... 



41-446 



31-14 



34-86 



Magnesia ...... 



2-32 



8-0 



2-64 



Phosphate of peroxide of iron 



0-20 



1-4 



1-40 



Phosphate of lime ... 



10-20 



16-4 



19 89 



Phosphate of magnesia 



none. 



0-6 



0-51 



Organic matter .... 



0-44 



3-2 



4-39 



Insoluble silica .... 



0-40 



1-6 



1-90 



Coal 



0-30 







106-459 



109-68 S. 114-82 S. 



13. Yellow Birch [Betula excelsa) . 



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

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





Bark. 



Outside wood. 



Heart wood 



Potash 



0-917 



4-237 



5-60 



Soda .... 



0-543 



12-36 



9-54 



Chloride of sodium • 



2-369 



0-12 





Sulphuric acid - 



3-021 



6-87 



1-92 



Carbonic acid ... 



33-25 



18-S57 



36-69 



Lime - 



48-22 



27-50 



22-33 



Magnesia ..-.-- 



2-40 



8-96 



9-76 



Phosphate of peroxide of iron, ) 





2-30 



1-41 



Phosphate of lime - - > 



9-70 ) 



18-50 



15-35 



Phosphate of magnesia • ) 



) 







Organic matter • « 



1-50 



5-00 



0-80 



Insoluble silica - - - 



- 



1-60 



0-90 



Coal .... 



- 



100 



0-30 



101-94 



107-304 



104-60 



