1866.] 



BRUNET — ON THE GENUS PICEA. 



109 



" For a barrel, a boiler holding at least a quarter more is required. 

 This being filled with water, and heated, a bundle of spruce 

 branches, broken small, and about twenty-one inches in girth, is 

 added, and the water is kept boiling until the bark readily peels 

 off from the whole length of the branches. Then a bushel of oats 

 is roasted by portions, in a great iron pan, about fifteen sea-biscuit 



Figure a. Longitudinal tangential section of the wood of P. alba. 

 c. ligneous cellules ; m. medullary rays;_p, discs ; (500 diameters.) 



Figure b. Longitudinal section, parallel to one of the medullary rays ; 

 v. medullary rays ; p. discs; (500 diameters.) 



Figure c. Transverse section of the same wood ; a. fibres of the autum- 

 nal wood ; &. fibres of the spring wood ; c. resiniferous ducts ; 

 (300 diameters.) 

 These figures were drawn by the author and engraved by Mr. G. 



J. Bowles. 



