ARKANSAS. 99 



dairying was temporarily met by renting. Four agricultural schools 

 were provided for by the last State legislature, and the director of the 

 station has a controlling influence in the organization of these schools 

 as a member of their joint board. 



The substations were maintained as in previous years, the State 

 providing $1,000 each annually for these institutions. The last legis- 

 lature appropriated in all $35,900 for the use of the college and 

 station for the biennium ending June 30, 1911. In addition, $10,000 

 was appropriated for tick eradication. 



Satisfactory progress was made in work on the Adams-fund proj- 

 ects outlined in previous reports. The hog-cholera investigations 

 were partially reported upon during the year. It was concluded that 

 pneumonia occurring with hog cholera is generally due to the action 

 of swine-plague bacteria, and is of frequent occurrence unassociated 

 with contagion. It is further stated that all the symptoms and post- 

 mortem lesions of hog cholera of natural origin may be produced by 

 artificially induced cultures of BaciUus cholerce sms, and that this 

 artificially induced disease is transferable by cohabitation and by 

 inoculation, but that it then appears in an attenuated form. In the 

 study of toxic principles of cottonseed meal a series of tests to de- 

 termine the best solvent for the extraction of the meal was made. 

 Further work on this project included a more thorough study of the 

 relative toxic effect of seed from different varieties grown under 

 varying conditions. 



The facilities for investigation on the woolly aphis were improved 

 by the addition of an insectary and an experimental orchard. Special 

 attention was given during the past season to the individual life his- 

 tory of the insect and the immunity of apple trees to its ravages. 

 In studying the stages of development, two lines of descent were 

 carried through the season, and from March to October of 1910 14 

 generations were grown. A comparative study was made of this 

 insect and of similar forms infesting the wild haws. A test was 

 also in progress to determine the reported immunity to the attacks 

 of this pest on the roots of the Northern Spy, about an acre of 

 Northern Spy trees grow^n on their own roots being devoted to 

 throwing light on this important point. 



In the cattle-tick investigations, the life history of the Texas-fever 

 germ has now been quite fully worked out, but certain phases of this 

 problem still aw^ait solution. In this connection the methods of 

 hyperimmunization and vaccination were studied. The work on 

 apple-twig blight was well advanced during the season. 



In addition to the Adams-fund projects, a large amount of work 

 was carried on in the different departments of the station. The 

 work in agronomy included breeding of corn, wheat, oats, barley, 



