PRODUCTION OF ANTITOXINS FOR THERAPEUTIC PURPOSES 229 



injected with 10,000 units of antitoxin and with 5000 units of toxin, an 

 amount sufficient to kill 5000 guinea-pigs each weighing 250 grams. If 



FIG. 69. A LARGE TOXIN FILTER. 



The culture is contained in the large bottle on the shelf, and drains into the flask, 

 which in turn empties into the earthen " candle." By means of a vacuum the culture 

 is filtered through the "candle" and collects in the large bottle at the base of the stand. 



antitoxin is not given with the first doses of toxin, only one-tenth of the 

 dose advised is to be given. After from three to four days, or as soon as 





