16 BULLETIN 584, U. S. DEPARTMENT OF AGRICULTURE. 
work and to take part in the intensive work in selected areas would, 
of course, be needed. 
The State live-stock sanitary board or the State veterinarian (ex- 
cept in States where such work is delegated to the State college) 
should maintain close supervision and inspection of all establishments 
producing anti-hog-cholera serum for use only within the State. It 
would not be essential for such inspection to be carried out at plants 
where Federal inspection is maintained. There appears to be no good 
reason for duplicating this work, but there is much reason for in- 
sisting upon the same standard of excellence for all serum that is to 
be sold to farmers, and this can be accomplished only by uniform 
methods of inspection. 
CONTROL OF SERUM AND VIRUS. 
In addition to the duties described above for the three organizations 
concerned, there is certain other work to be done which might perhaps 
be assigned to either the one or the other of the two State organiza- 
tions, the decision in this respect to be governed by local conditions 
and by the State laws in force. Among such duties may be mentioned 
the control of the use of virus in immunization work and the ar- 
rangement for the maintenance of supplies of serum, if such supplies 
are not already available, by private or public serum plants and in 
localities where all farmers may quickly procure it. This last-named 
need is of course essential, for when serum is needed it is needed 
quickly, and any delay in this respect might entirely nullify all of 
the other work. There is no justification for the expenditure of large 
sums to demonstrate and explain the use of serum unless serum can 
be obtained when needed. This problem should present little diffi- 
culty, for besides the considerable number of State plants, there are 
now in the country a large number of well-equipped private firms 
producing serum in large quantities, and these, with the State plants, 
are capable of supplying any demand that is likely to arise. 
COST OF CARRYING ON THE WORK. 
It may be well in conclusion to say a few words concerning the 
cost of carrying out a plan such as that here suggested. It would 
probably be unwise to attempt to cover the entire country at the very 
beginning, for work of this kind is best done by experienced men 
who will proceed carefully and thus avoid the annoyances and con- 
fusion that would follow hasty or ill-advised action. Men of this 
type are not readily procured. Therefore it will be best to make a 
slow start, first giving attention to certain sections of a State, and 
when these are properly organized, proceeding to another. With this 
idea in mind it is suggested that the Federal Government might sup- 
