68 The Veins of the Adrenal 
Fic. 3. Large central veins from the medulla of the human suprarenal 
gland. The figure shows the distribution of the elastic tissue and the bundles 
of smooth muscle which are seen in transection in the larger vein and in 
longitudinal section in the smaller ones below. The series shows these 
latter vessels to be branches of the former, the section being selected to 
show a plane near the point of division. The smaller vessels are very ob- 
liquely cut and the muscle is distinctly longitudinal. Fixation, Zanker’s 
fluid; stain, Mann’s hematein, Weigert’s elastic tissue, and Van Gieson’s 
picro-fuchsin; thickness, 10 1; photomicrograph, X 37. 
