PRODUCTION OF ANTITOXINS FOR THERAPEUTIC PURPOSES 237 



injected with 10,000 units of antitoxin and the following day with 5000 

 units of toxin, an amount sufficient to kill 5000 guinea-pigs each weighing 



FIG. 72. 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. 



250 grams. If 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 



