1918] CONTENTS. XHT 



Page. 

 Bulletin 568, The Presence of Arsenic in Hops, W, W. Stockberger and 



W. D. Collins 9 



Bulletin 569, The Sanitary Control of Tomato-canning Factories, B. J. 



Howard and C. H. Stephenson 13 



Bulletin 570, The By-products of Rice Milling, J. B. Reed and F. W. 

 Liepsner 67 



Bulletin 571, The Pecan Leaf Case-bearer, J. B. Gill 656 



Bulletin 572, The Recovery of Potash as a By-product in the Cement In- 

 dustry, W. H. Ross, A. R. Merz, and C. R. Wagner , 123 



Bulletin 573, The Sheep Industry on the Minidoka Reclamation Project. 

 E. F. Rinehart 168 



Bulletin 574, The Conversion of the Weights of Mechancial Separations 



of Corn, Wheat, and Other Grains into Percentages, E. G. Boerner 140 



Bulletin 576, The Manufacture of Cottage Cheese in Creameries and Milk 



Plants, A. O. Dahlberg 178 



Bulletin 577, Experiments in the Control of Potato Leak, L. A. Hawkins. 149 



Bulletin 578, A Study of Haymaking Crews and Labor Costs, H. B. 



McClure 793 



Bulletin 579, Celery Storage Experiments, H. C. Thompson 142 



Bulletin 580, Effects of Grazing upon Western Yellow-pine Reproduction 



in the National Forests of Arizona and Nejv Mexico, R. R. Hill 447 



Bulletin 581, Microscopical Studies on Tomato Products, B. J. Howard 

 and C. H. Stephenson 166 



Bulletin 582, Farm Management and Farm Profits on Irrigated Land 

 in the Provo Ai-ea (Utah Lake Valley), L. G. Connor 493 



Bulletin 583, Report on Experimental Convict Road Camp, Fulton 



County, Ga.. H. S. Fairbank, R. H. Eastham, and W. F. Draper 789 



Bulletin 584, The Control of Hog Cholera, with a Discussion of the Re- 

 sults of Field Experiments, A. D. Melvin and M. Dorset 183 



Bulletin 585, A Guide for Formulating a Milk Ordinance 177 



Bulletin 586, Progress Reports of Experiments in Dust Prevention and 

 Road Preservation, 1916 790 



Bulletin 587, The Handling and Storage of Apples in the Pacific North- 

 west, H. J. Ramsey et al 143 



Bulletin 588, Increased Cattle Production on Southwestern Ranges, J. T. 

 Jardine and L. C. Hurtt 470 



Bulletin 589, The 28-hour Law Regulating the Interstate Transporta- 

 tion of Live Stock: Its Purpose, Requirements, and Enforcement. H. 

 Coding and A. J. Raub 470 



Bulletin 590, A System of Accounting for Fruit Shipping Organizations, 

 G. A, NahstoU and J. R. Humphrey 793 



Bulletin 591, Manufacturing Tests of the Official Cotton Standards for 

 Grade, W. S. Dean and F. Taylor 434 



Bulletin 592, Courses in Secondary Agriculture for Southern Schools 



(Third and Fourth Years), H. P. Barrows 496 



Bulletin 593, Judging Sheep as a Subject of Instruction in Secondary 



SchooLs, H. P. Barrows 496 



Bulletin 594, Geogi-aphy of Wheat Prices, L. B. Zapoleon 742 



Bulletin 595, Winter Wheat in the Great Plains Area, E. C. Chilcott, 



J. S. Cole, and J. B. Kuska 440 



Bulletin 596, Feeding Dried Pressed Potatoes to Swine, F. G. Ashbrook 



and R. E. Gongwer 473 



Bulletin 598, Orchard Injury by the Hickory Tiger Moth, D, Isely 464 



