172 STATE BOARD OF AGRICULTURE. 



The serum eontinnes to give good results, in fact. I am disposed to 

 think that our ability to employ it effectively is increasing with our ex- 

 perience in the details of manufacture and application. 



It also falls to Miss Rademacher's lot to keep record of the number 

 of tuberculin tests made under the direction of this department. She 

 reports the number as follows : 



No. cattle tested for tuberculosis 510 



No. cattle condemned 8 



The work of this division of the Experiment Station has gone forward 

 during the past year very smoothly and satisfactorily. The spirit mani- 

 fested in the conduct of all of this work reported has been admirable. 

 Each and evei';\^ member of the staff has been faithful and persistent in 

 carrying forward his share of the burden. 



Verv respectful v submitted. 



CHARLES E. MARSHALL, 



Bacteriologist. 

 East Lansing, Mich., June 30, 1911. 



REPORT OF THE CHEMIST. 



Director Shaw: 



I herewith submit the following report of the work of the Chemical 

 Division for the year ending June 30th, 1911. 



The work of the division may be divided into three general classes, 

 viz. : investigational, cooperative, including analyses of materials sent 

 in by residents of the state, and the fertilizer control. 



The only new line of investigation undertaken during the year was 

 a study of the manufacture and storage of lime-sulfur spray solu- 

 tion. Mr. Jas. E. Harris, who was temporarily engaged during the 

 summer of 1910 to work on this problem, originated new methods of 

 analysis and also brought out some new points in connection with its 

 manufacture and storage. 



The lines of research under the Adams fund, "A study of the organic 

 nitrogenous compounds in soils and their variability'' and "A study of 

 the chemical factors rendering soluble the insoluble phosphates of the 

 soil," are being continued and the laboratory investigations are now 

 being supplemented by pot experiments. 



The cooperative work with the Horticultural Department reported 

 last year is being continued and the experiments at Lawton, on the in- 

 fluence of cover crops and commercial fertilizers upon the yield of 

 grapes, is beginning to create a considerable amount of interest. 



One hundred and twenty samples of a miscellaneous nature, sent in 

 by residents of the state, have been analyzed. 



The fertilizer control occupies the time of two chemists about four 

 months each year. The number of different brands of fertilizer sold in 

 the state has "not increased much during the past year though the actual 



