2 DEPARTMENT OF AGRICULTURE BULS. 976-1000. 



Depaetment Bulletin No. 980. — Inspection and Grading of Hay : Page, 



Grades and inspection service 2 



How hay is inspected and graded 7 



Certificates of grade and their uses 13 



Uniform grades and inspection 15 



Department Bulletin No. 981. — Sudan Grass and Related Plants : 



Introduction into the United States 1 



Description and botanical relationships 3 



Distribution and importance of Sudan grass in Africa 16 



Sudan grass in other countries 17 



Soil relations , 17 



Climatic adaptations 18 



Relative importance of the crop 21 



Hay production 20 



Date of seeding : , 27 



Method of seeding 28 



Rate of seeding 33 



Harvesting 34 



Sudan grass and legume mixtures 37 



Utilization of Sudan grass 41 



Seed production 52 



Diseases of Sudan grass 63 



Insect enemies of Sudan grass 63 



Weeds 64 



Summary 64 



Literature cited 67 



Department Bulletin No. 9S2. — Market Statistics : 

 Part I: 



Live stock 1-101 



Dressed meats 102-130 



Part II : 



Wool 131-142 



Part III : 



Dairy products, poultry, and oleomargarine 142-155 



Part IV : 



Grain, hay, feed, and seeds 155-215 



Part V : 



Fruits and vegetables 216-267 



Part VI : 



Cotton 268-273 



Department Bulletin No. 983. — The Manufacture of Ethyl Alcohol 

 from Wood Waste : 



Sources of ethyl alcohol and comparative costs of production 1 



Amount of wood waste available 3 



The present value of wood waste 4 



Limitations to the utilization of wood waste 5 



Processes for the manufacture of alcohol from wood 6 



History of the processes . 7 



Outline of investigations 15 



Apparatus and procedure 16 



Methods of analysis 17 



Yeasting and fermentation 19 



Results 27 



Effect of catalyzers other than sulphuric acid or in addition thereto, 53 



Study of different species . 56 



Source of fermentable sugar 59 



By-products , , 61 



Analysis of results : 62 



Plant equipment and operation '. 63 



Costs 1 67 



Sugar and alcohol yields from wood wastes—. - — 69 



Acid yields from wood wastes . 84 



Fermentation record in wood distillation . — 85 



Digester record in wood distillation __'_ — 95 



List of patents 9S 



