90 REPORT OF OFFICE OF EXPERIMENT STATIONS. 



The veterinarian published during the year the results secured in 

 the study of anthrax carried on in cooperation with this department 

 during the last three years. As stated in Bulletin 90 of the station, 

 he has produced an antibacterial serum by highly immunizing sheep 

 by repeated inoculations, first of attenuated anthrax bacilli, and fol- 

 lowing these by inoculations of the most virulent races of the bacilli in 

 increasing doses until the animal would withstand 50,000 times the 

 minimal lethal dose with impunity. It is further pointed out that 

 the serum will confer a passive immunity immediately and thus pro- 

 tect the animal against fatal infection over the period which is neces- 

 sary for the vaccine to confer an active immunity. 



This bulletin also reports observations on the efficacy of vaccines 

 carried on for two seasons, which indicate that the anthrax vaccine 

 will remain active for several months, and that such cultures mav be 

 prepared several months in advance of their use provided incubation 

 is carried to a point where all growth ceases or spores form. The 

 veterinary research work during the past year also included some 

 preliminary work on cerebrospinal meningitis of the horse. 



With the Hatch fund experiments were made with fertilizers and 

 cover crops for peaches and apples, fertilizers for tomatoes and pota- 

 toes in relation to their effect on the yield and quality, varieties of 

 fruits and vegetables, lime and manure in rotation experiments with 

 corn, wheat, oats, and grass, and varieties of corn, wheat, oats, cow- 

 peas, soy beans, and other crops. A new series of 1, 2, 3, and 4 year 

 rotation experiments to emphasize the importance of green manures 

 was started during the year. 



The station carried on no cooperative work other than that con- 

 ducted in connection with extension work. For the present biennium 

 an annual State appropriation of $4,500 is available for extension 

 purposes. This work is mainly done by station officers and consists 

 largely in cooperative experiments. 



The publications received from the station during the year were 

 as follows: Bulletins 89, Crimson Clover Culture; 90, Anthrax; 91, 

 The Relation of Parasitic Fungi to the Contents of the Cells of the 

 Host Plants — I, The Toxicity of Tannin; 92, Annual Report of the 

 Director for 1910; and 93, The Double Blossom of the Dewberry. 



The income of the station during the past fiscal year was as follows: 



United States appropriation, Hatch Act $15,000.00 



United States appropriation, Adams Act 15.000.00 



State appropriation 5. 000. 00 



Farm products 1. 9S8. 40 



Total 36, 988. 40 



The improvement of the equipment and work of the Delaware 

 station is steady and substantial, and the scientific and practical value 



