EXPERIMENT STATION REPORTS. 137 

 DETAILS. 



Serum — 



Sold, for which collections have been made 32,145 cc. 



Used for testing and experiments 14,688 cc. 



Sold for which the collections are outstanding 8,095 cc. 



On hand — good 93,084 cc. 



On hand — untested 57,813 cc. 



On hand — poor 28,618 cc. 



Total production 2.34,443 cc. 



Virus' — 



Sold for which collections have been made 1,471.5 cc. 



Used for testing and experiments 935 cc. 



Sold for which the collections are outstanding 227 cc. 



Used for hyperimmunizing SAvine 95,456 cc. 



Used for inoculating in laboratorj' 131 cc. 



Used for simultaneous vaccination in laboratorv 300 cc. 



98,521.5 cc. 



GRAND TRAVERSE DISEASE. 



It was our purpose this year to carry out some work on the etiology 

 of the Grand Traverse disease. Because of this fact, we have with- 

 held a manuscript, considering this disease, prepared by C. D. Smith, 

 former director of this station. The work on hog cholera has been so 

 extensive and pressing that the Grand Traverse disease has been 

 neglected, excepting some correspondence and a visit to that region by 

 Dr. Giltner. After going over the situation, we have concluded to defer 

 the studies on etiological factors until such a time as may prove 

 whether the dietary recommendations contained in the bulletin will have 

 the effect of correcting the trouble by the introduction of better methods 

 of feeding. Should improved methods answer the purpose, that is the 

 checking of the disease, then it will not be necessary to go further in 

 the study, unless for the sole purpose of knowing what is the immediate 

 cause. 



CONTAGIOUS ABORTION. 



For the past year, we have had some experience in fighting con- 

 tagious abortion. It is unfortunate that there is no specific treatment 

 for this trouble which probably causes more financial loss to the cattle 

 owners of Michigan than any other disease. We have had in mind 

 writing something formal for the benefit of the farmers, but we do not: 

 feel sufficiently secure in making any recommendations. The best we 

 can do at the present time is to offer our plan of treatment which may 

 check the disease, if thoroughly and conscientiously applied in most 

 herd epidemics. There will be some disappointments, however, but per- 

 sistency in following the treatment will aid much toward success. 



We herewith append the treatment — a modification and compilation 

 of several along the same lines. 

 18 



