enough for twenty 30 to 50-pound shoats, was given free to all hog owners whose animals were already infected or were in immediate danger of contracting the disease, providing the proper application blank was filled out and signed. Since the state appropriation covering the allowance of free serum was exhausted by the above date and no appropriation was made by the State Legislature for the manufacture of hog serum for the future, no more free serum will be distributed. Applications covering all serum sent out must be on file in the office of the Veterinary Division, University of California. As it is essential that the laboratory know the results of the serum work in the field in order to protect the users of serum and the experiment station, all applications and reports of each inoculation on the regular blanks furnished by the department must be sent in to the Veterinary division, University of California, Berkeley, or there will be made at the end of five weeks an additional charge of 1c per hog for the application and for each of the four reports not sent in, or a total of 5c per hog. If the number of hogs treated is not given the charge will be reckoned at the rate of 1c per 30 cubic centimeters of serum shipped. If application is made by letter or telegram the regular form will be placed in the box of serum and should be at once filled out, signed and mailed. Application blanks may be obtained by addressing the Agricultural Experiment Station, Veterinary Division, Berkeley, California; the State Veterinarian, Sacramento, California; and the live stock inspectors of the various counties. The Experiment Station has tried to distribute blanks to as many hog raisers, dairymen and veterinarians as possible. In cases where a night telegram is necessary in sending for serum. the following form should be used: Veterinary Division, University of California, Berkeley, Calif. agree to fill out, sign and mail application blanks and reports furnished with serum. I am a resident of California. (Signed) (Owner of hogs) About a year ago, owing to the demand in the Imperial Valley for serum, a distributing station was located at Meloland and since that date all orders for the Imperial Valley are filled at that station. Considerable time is saved by sending these orders directly to Walter E. Packard at Meloland. All unused serum on such orders for which credit is desired, however, must be returned by express, charges prepaid, to the Veterinary Division, University of California, Berkeley. California, within the time limit stamped on the bottle. When application is made by letter or telegram to the station for serum and the order is shipped and the package returned, none of the serum having been used, a charge of $1.00 will be made to cover the expense of packing and handling the order. REPORTS *1896. 1897. 1902. 1903. 1904. Report of the Viticultural Work during the seasons 1887-93, with data regarding the Resistant Vines, their Selection, Adaptation, and Grafting. Appendix to Viticultural Report of the Agricultural Experiment Station for 1898-1901. Twenty-second Report of the Agricultural Experiment Station for 1903-04. 186. The Oidium of the Vine. 187. Commercial Fertilizers. (Jan., 1907.) *188. Lining of Ditches and Reservoirs to Prevent Seepage Losses. 189. Commercial Fertilizers. (June, 1907.) *191. California Peach Blight. 192. Insects Injurious to the Vine of Cali fornia. 194. Commercial Fertilizers. (Dec., 1907.) 195. The California Grape Root-worm. 197. Grape Culture in California; Improved Methods of Wine-making; Yeast from California Grapes. 198. The Grape Leaf-Hopper. 199. Bovine Tuberculosis. 201. Commercial Fertilizers. (June, 1908.) 202. Commercial Fertilizers. (Dec., 1908.) * Edition exhausted. 203. Report of the Plant Pathologist to July 1, 1909. 204. The Dairy Cow's Record and the 205. Commercial Fertilizers. (Dec., 1909.) Manual. Settler's Crop 211. How to Increase the Yield of Wheat in California. 212. California White Wheats. 215. The House Fly in its Relation to 216. A Progress Report upon Soil and 217. Honey Plants of California. 219. Report of Live Stock Conditions in 220. Fumigation Studies No. 5; Dosage Tables. *221. Commercial Fertilizers. (Oct., 1911.) 222. The Red or Orange Scale. 224. The Production of the Lima Bean. 227. Grape Vinegar. *228. Pear Thrips and Peach Tree Borer. 231. Walnut Culture in California. Wal nut Blight. 232. Commercial Fertilizers. 233. Three Years' Work of the Ferndale (Humboldt County) Cow Testing Association. 234. Red Spiders and Mites of Citrus Trees. 235. Further Proof of the Cause and In- 236. The Economic Value of the Western Conditions. *238. The Selective Improvement of the Lima Bean. 239. The Culture of Tomatoes in California, with Special Reference to Their Diseases. 29. Preliminary Announcement Concern. ing Instruction in Practical Agriculture upon the University Farm, Davis, Cal. 46. Suggestions for Garden Work in California Schools. 52. Information for Students Concerning the College of Agriculture. 55. Farmers' Institutes and University Extension in Agriculture. *60. Butter Scoring Contest, 1910. 61. University Farm School. 62. The School Garden in the Course of Study. 63. How to Make an Observation Hive. 65. The California Insecticide Law. 66. Insecticides and Insect Control. *67. Development of Secondary Agriculture in California. School 68. The Prevention of Hog Cholera. 69. The Extermination of Morning-Glory. 70. Observation of the Status of Corn Growing in California. 74. Rice. 75. A New Leakage Gauge. 76. Hot Room Callusing. 77. University Farm School. 78. Announcement of Farmers' Short Courses for 1912. 79. List of Insecticide Dealers. 80. Boys' and Girls' Clubs. 81. Sweet Pea Growing Clubs. 82. The Common Ground Squirrels of California. 83. Potato Growing Clubs. 84. Mushrooms and Toadstools. 85. A Preliminary Report of a Nematode Observed on Citrus Roots and its Possible Relation with the Mottled Appearance of Citrus Trees. 86. Olives in California. 87. Alfalfa. 88. Advantages to the Breeder in Test- 89. Hog Cholera and its Prevention. 91. Disinfection on the Farm. 92. Infectious Abortion and Sterility in Cows. *93. Bean Growing Clubs. 94. The Dairyman's Relation to Quality. 97. Increasing Dairy Profits. 98. Plowing and Cultivating Soils in California. 99. Hatching and Rearing of Chicks. 100. Pruning Frosted Citrus Trees. 101. Codling Moth Control in the Sacramento Valley. 102. The Woolly Aphis. *103. Chemical Analyses of Waters. 104. The Amended Insecticide Law. 105. Analyses of Insecticides for Users. *Edition exhausted. Assisted by T. FRANCIS HUNT and W. H. NIXON. There are many orchards of thrifty, large seedling walnut trees in the State, particularly in Santa Barbara, Ventura, Los Angeles, and Orange counties, which would be much more profitable than at present were it not for the attacks of walnut blight and aphis. The development of new walnut varieties more resistant to blight presents no relief to the owners of these groves, since most of their best walnut land is already occupied by large trees, and these trees, moreover, are of a good commercial type and would yield very good returns save for these two pests. The only apparently feasible means of combating blight and aphis on such trees lies in the development of some practical spraying method. The necessity of controlling aphis as well as blight is apparent to every walnut grower, since this pest has in recent years become really more serious than the much dreaded blight. Spraying experiments carried on by this Division several years ago seemed to show the impracticability of controlling blight by spraying, on account of the time and expense required for treating such large trees by ordinary spray methods. Recent developments, however, in sprayers and nozzles have made it possible to spray large trees more quickly and cheaply than could be done a few years ago, and we therefore decided last year to try out again the possibilities in this direction. In this connection a considerable acreage of walnut trees was sprayed, using various methods and mixtures. As a result of the work, it may be said in brief that one method gave particularly promising results, especially in the control of the aphis. This method consisted in spraying the trees, while they were in a dormant condition, with lime-sulphur solution. Effect on Blight. The results of the spraying upon the walnut blight were difficult to establish on account of the slight occurrence of the disease in the sprayed districts during the past season. In this respect the work was |