Tue Microscopr. 151 
mine. The structure of tendon is best studied by following the 
nitrate of silver and gold methods. Immerse a thin section of 
A, Yellow Elastic Tissue. B, White Fibrous Tissue after adding acetic 
acid. x 400. 
fresh tendon for a few minutes in a } per cent. solution of 
nitrate of silver and follow the regular plan of silver staining. 
Use a 4 per cent. solution of chloride of gold and treat after 
the usual method. Either of these stainings will show the 
corpuscular element. 
A 10 per cent. solution of common salt will isolate the cells 
in young tendon tissues if allowed to act upon it for three or 
four days. Picrocarmine staining will give good results. 
YELLOW ELASTIC TISSUE, 
Small pieces from the ligamentum nuchez of the ox are 
placed in a 10 per cent. solution of common salt for a few days 
in order that the fibres may be more easily teased apart. Thor- 
ough teasing with needles will cause the tissue to show to 
good advantage, and as the fibres will not take staining they 
can be mounted unstained in glycerine or glycerine jelly. The 
elastic net-work is well shown in the mesentery of the frog. A 
small portion is spread out on the slide and a drop of a dilute 
solution of acetic acid added. The white fibrils swell up and 
