ERADICATION OF PUIJ.ORUM DISEASE 1930-31 21 



Photograph 8. — Removing the Sera from the Tubes, Adding Test Fluid, Reading of 

 Tests, and Transporting the Used Glassware and Tested Samples. 



Photograph 9. — Reading and Recording of Tests After the Serum and Test Fluid 

 Are Mixed aud Incubated. 



