Apr. 15, 191S 



Disinfection of Hides 



87 



hide. The plates showed no growth even after three days' incubation; 

 hence, it seemed that the hydrochloric acid and sodium chlorid had de- 

 stroyed the anthrax spores and all other organisms as well. 



Experiments 32 and 33 (Table XIV) show comparative tests of the 

 Seymour-Jones and Schattenfroh methods upon pieces of hide of the 

 same lot. These were prepared by the method described under experi- 

 ment 31. The greatest possible care was taken to neutraUze the disin- 

 fectant, so far as the Schattenfroh method was concerned. Sodium 

 sulphid was used both for Seymour-Jones and Schattenfroh pieces, 

 because it seemed possible that the depilatory action of the sodium 

 sulphid might bring up undisinfected spores from the depths of the hair 

 follicles. A number of pieces of disinfected hide were kept several days 

 and then treated with the neutralizing agent. 



Table XIV. — Comparison of Seymour-Jones and Schattenfroh methods of disinfecting 



hides 



EXPERIMENT 32 



E-XPERIMENT 33 



2873s 



28736 

 28737 



28738 

 28739 



28740 

 28729 



28730 



28773 



28774 

 28771 



28772 



Hydrochloric acid (2 per cent)+ 

 sodium chlorid (10 per cent). 



Do 



Do 



Do. 

 Do. 



Do. 



Mercuric chlorid (i: 2, 500) + for- 

 mic acid (i per cent). 



Do 



Sodimn carbonate (2 per cent), 



'A hour. 



do 



Potassium hydroxid (0.5 per 



cent), 2 hours. 



do 



Sodium sulphid (i per cent), 2 



hours. 



do 



do 



.do. 



Lived. 



Do. 

 Do. 



Do. 

 Do. 



Do. 

 Do. 



Died. Anthrax. 



Neutralization 4 days later. 



Mercuric chlorid (i: 2,5oo)+for- Sodium sulphid (i per cent), 

 mic acid (i per cent). hours. 



Do ' do 



Hydrochloric acid (2 per cent)+ | do 



sodium chlorid (10 per cent). 

 Do do 



Died. Anthrax. 



Lived. 

 Do. 



79827°— 15 7 



