INDIANA. 135 



Increased provision was made for extension work by the station. 

 The policy with reference to this work is to have in each main de- 

 partment of the station at least one man who ordinarily takes part 

 in the regular work of the department under the direction of its 

 head, but is subject to call from the head of the extension department 

 of the college for work under his direction Avhen needed. In accord- 

 ance with this policy, several extension assistants were added to the 

 station staff during the year and others are to be apj^ointed. 



Additions to the station staff during the year were made as follows : 

 F. G. King, associate m animal husbandly; A. G. Philips, associate 

 in poultry work; W. R. Wright, assistant dairy bacteriologist; J. W. 

 Wellington, Morris W. Richards, and J. G. Boyle, assistants in horti- 

 culture; C. R. Orton and Mary A. Fitch, assistants in botany; Otis 

 Craiie, extension work in poultry; D. O. Thompson, extension work 

 in animal husbandry; and Helen H. Henry, assistant in extension 

 work. Since the close of the year H. P. Rusk, assistant in animal 

 husbandry, resigned to accept a similar position in the Illinois station. 



Little change was made during the year in the lines of work carried 

 on with the Adams fund. The work on rusts was continued, and 

 among other results it was found that there are two distinct species 

 of rust on the clovers, one with red clover and the other with white 

 clover as the principal host. In greenhouse work more than 300 

 collections of rust material were used and inoculations were attempted 

 on more than 500 host plants. 



The work on the factors influencing condensed milk was completed 

 and standards for evaporated milk, sweetened condensed milk, and 

 condensed skim milk Avere worked out. It was pointed out that the 

 Federal standard of evaporated milk is too high and can be complied 

 with only under the most favorable conditions, and a new standard 

 for evaporated milk is recommended. The studies on moisture con- 

 tent of butter and conditions affecting it were partly completed, and 

 important work was also done during the year on the keeping quality 

 of butter made from raw and pasteurized cream. The results of 

 some of these experiments show that the percentage of olein in butter 

 fat is highest during the summer months and lowest during the win- 

 ter months, that the glycerids of the soluble and oleic acids, having 

 a low melting point, are capable of absorbing and retaining over 

 twice as much Avater as the fats of high melting point, that the period 

 of lactation and feed largely control the relative proportion of hard 

 and soft fats, and that the moisture-retaining property of butter is 

 largely governed by the percentage of soluble and oleic acids present. 



A first report was issued on the hog-cholera investigations. This 

 work during the year was confiued largely to the ]n'oduction of hog- 

 cholera serum and the improvement of the methods now employed 

 in its production. Experiments were beg"un for the purpose of 



