^mmmm 



BACTO 



LOEFFLER'S 

 BLOOD SERUM, 



DEHYDRATED, 



FOR THE DIAGNOSIS OF 



DIPHTHERIA 



In times of emergency every hour counts 



If you have a bottle of LOEFFLER'S BLOOD SERUM. DEHYDRA- 

 TED, on yoar laboratory shelf, you can yourself prepare within one hour 

 1 000 fresh moist slants ready to culture. 



Simply weigh out the powder, restore the necessary moisture, with dis- 

 tilled water, dispense into tubes, coagulate and sterilize, according to our 

 directions. 



This gives k finished medium ready to use. 



No time-consuming waits for the separation of serum from clot. 



No spoilage. Dehydrated media keep at all temperatures. They are dry. 



^/so NUTRIENT AGAR :. NUTRIENT BROTH :: CARBOHYDRATE BRO FHS. £7c. 



• COMPLETE LIST ON APPLICATION 



Carried in stock by principal dealers in scientific supplies 



DIGESTIVE FERMENTS COMPANY 



DETROIT, MICHIGAN, U.S.A. 



