Ig2 ' BOTANICAL GAZETTE [SEPTEMBER 
Fic. 28.—Tangential section of wood of A. saccharinum; X 20. 
Fic. 29.—Radial section of wood of box elder; X 20. 
Fic. 30.—Transverse section of wood of box elder; X 20. 
Fic. 31.—Tangential section of wood of box elder; X 20. 
Fic. 32.—Transverse section of leaf of box elder; X 500. 
Fic. 33.—Transverse section of leaf of A. saccharinum; X 500. 
Fic. 34.—Tangential section, medullary ray of box elder; x 500 
Fic. 35.—Tangential section, medullary ray of A. engine Y, 500. 
Fic. 36.—Radial section, medullary ray of box elder; X 500 
Fic. 37.—Radial section, medullary ray of A. rubrum; X 500. © 
Fic. 38. —Transverse section of wood of A. saccharinum; X 500. 
Fic. 39.—Transverse section of wood of box elder; 500 
Fic. 40.—Transverse section through the amyliferous zone cot the medulla 
of box elder; X 500. 
Fic. 41.—Transverse section through the amyliferous zone of the medulla 
of A. saccharinum; X 500. 
