1912.] 



Examining Normal and Diseased Tissues. 



149 



3. Diamin-blue BB. — It is an excellent intra-vitam stain. Herr Schulemann 

 has found that 300 c.c. of a 1-per-cent. solution, injected into the peritoneal 

 cavity of a clog weighing about 10 kgrm., produce within 24 hours a magnifi- 

 cent coloration of the animal. Its formula is as follows : — 



Na0 3 S 



4. Diamin-hlack BH. — A most reliable vital stain, of which the formula is 

 as follows : — 



NETo OH 



N = N< 



>isr = N 



5. Vital "Neu Rot." 



In mice 2 c.c. of a 1-per-cent. solution per 20 grm. of animal's body weigbt 

 may be weekly injected. The effect is a brilliant scarlet stain of the animal. 

 Unfortunately, this scarlet colour is transformed into a brownish red colour 

 when the tissues are subject to formalin-fixation. 



6. Vital " Neu Orange." — 



\so 3 ]sra 



S0 3 Na N 



