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THE POPULAR SCIENCE MONTHLY 



ganization and personnel of the laboratory were greatly extended. An 

 advisory board was created, consisting of officers from the Army and 

 Navy Medical Corps, a scientist from the Bureau of Animal Industry of 

 the Department of Agriculture, and five men from civil life, who were to 

 be skilled in laboratory work bearing on public health problems. These 

 five at present are Victor C. Vaughan, dean of the School of Medicine 

 of the University of Michigan ; William Welch, professor of pathology 

 at Johns Hopkins University; Frank Wesbrook, professor of pathology 

 at the University of Minnesota ; Simon Flexner, of the Eockef eller 

 Institute ; and William T. Sedgwick, professor of biology at the Massa- 

 chusetts Institute of Technology. 



Rear of Stapleton Marine Hospital, showing Tents for Tuberculosis Patients. 



Three additions were made to the original divisions of pathology 

 and bacteriology. These were medical zoology, chemistry and pharma- 

 cology. Medical zoology embraces the study of parasitic diseases of 

 man. Under pharmacology, drugs are examined as to purity, potency 

 and action, and important work is done on the standardization of drugs. 

 By another act of July, 1902, provision was made for the licensing 

 of all establishments engaged in interstate traffic in viruses, serums, 

 toxins, antitoxins and analogous products. Samples of such products 

 are bought in the open market and tested for purity and strength. The 

 manufacturing establishments are inspected by medical officers, both 

 before and after the license is granted. Fines and suspensions or with- 

 drawal of license are the penalties for false labeling or faulty methods 

 of production. 



The laboratory makes a practise of assisting health officers of states 

 and communities which have no reliable laboratory facilities, by analyz- 

 ing samples of water, as to impurities, infection and potability. In- 



