234 REPORT OF OFFICE OF EXPERIMENT STATIONS. 



tion, the feasibility of vaccination, and the manner in which the 

 parasites find their way into the animaL As in the previous year, 

 attention was mainly given to the hookworm and stomach-worm dis- 

 ease in calves and lambs. It was found that upland and lowland 

 show a great difference in the prevalence of these parasites, and that 

 calves pastured on upland may be kept free from the disease. During 

 the last two years calves kept on a clean upland pasture remained in 

 good health. Sheep kept for 12 months on a pasture that was heavily 

 infested two years before developed no symptoms of the disease. 

 The entomologist also continued the study of the temperature rela- 

 tions of insects, giving special consideration to the factors affecting 

 hibernation, in order to determine whether parasites may be arti- 

 ficially hibernated on injurious insects. Studies of the squash bug 

 showed that temperature did not affect hibernation, but in case of 

 another species the opposite was found true. The various species 

 studied were found to be differently affected by temperature con- 

 ditions. 



The cottonseed-meal project was continued, feeding cows relatively 

 large quantities of the meal for a long period. Some individuals 

 were very much more quickly affected and succumbed more rapidly 

 than others. Feeding from 6 to 8 pounds of the meal daily to dairy 

 cattle for an extended period resulted in lessened production, udder 

 troubles, and abortion, and in some cases in unthrifty condition. 

 Progress was also made in the study of the poisonous effect of cotton- 

 seed meal on hogs, which was carried on cooperatively b}' the veteri- 

 narian and the chemist. Apparatus was devised for conveniently 

 securing large quantities of chemical extracts of cottonseed meal, and 

 these were fed to hogs in relatively large amounts. Attention was 

 specially given to different forms of phosphoric acid, and apparently 

 the effects varied with the different forms of the acid used. 



A large amount of hand pollination was performed in studying the 

 effect of pollen on barren stalks of corn, and the investigation of the 

 relation between soil and the quality of the cotton staple was carried 

 on in cooperation with cotton growers and expert graders of lint. 

 Although the prevalence of anthracnose interfered with the work 

 the past season, the data collected indicate that the soil had an in- 

 fluence on the length of fiber and that the rainfall also was an 

 important factor. A preliminary report on the cotton-anthracnose 

 project was made last year, and the work was continued actively by 

 the plant pathologist. Inoculations were made on 30 varieties which 

 proved susceptible, and the question of how the disease finds its way 

 into the boll was studied. The work with Rotundifolia gi-apes in- 

 volved a large amount of hand loollination, considerable data were 

 collected, and, incidental with the work, some study was made on 

 methods and time of pruning. 



