SCIENCE— ADVERTISEMENTS 





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 your 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 a 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. 



Jlho NUTRIENT AGAR :: NUTRIENT BROTH :: CARBOHYDRATE BROTHS, Etc. 



- COMPLETE UST ON APPUCATION • 



Carried in stock by principal dealers in scientific supplies 



DIGESTIVE FERMENTS COMPANY 



DETROIT, MICHIGAN. U.S.A. 



