CONTENTS y 



Page 

 Department Bulletin No. 1346. — Status of the Pronghorned 

 Antelope, 1922-1924: 



The pronghorned antelope 1 



Former and present abundance of pronghorns 1 



Characteristics of the American antelope 4 



■ Chosen habitat 7 



Conservation and control 8 



Conservation organizations and the antelope 9 



Washington conference on the conservation of the pronghorn 11 



Establishment of antelope refuges in Nevada 14 



Proposed Owyhee Antelope and Sage-hen Refuge, Idaho 15 



Restocking experiments, 1924 16 



Methods of capturing and transplanting antelope 18 



Results of a census of existing antelope 22 



Department Bulletin No. 1347. — Foot-Rot Diseases op Wheat in 

 America: 



Introduction 1 



Use of the term "foot rot" 2 



Take-all, the foot rot caused by Ophiobolus graminis 3 



The foot rot caused by Helminthosporium sativum 17 



An undentified foot rot found in the Pacific Coast States 28 



Other foot rots 30 



Other fungi capable of causing foot rots 33 



Discussion 34 



Literature cited 37 



Department Bulletin No. 1348. — An Appraisal op Power Used on 

 Farms in the United States: 



Introduction 1 



Sources of information 5 



Sources of power used on farms 6 



Annual use and cost of power on farms in the United States 7 



Number of power units or installations on farms and number of 



workers engaged in agriculture 9 



Primary power available and horsepower-hours utilized annually on 



farms 10 



Effect of the use of power and machinery on production and income. 14 



Power and lab or requirements of farm operations 17 



Power and labor requirements of farm commodities 19 



Distribution of farms and farm lands and types and sizes of farms 19 



Seasonal distribution of the use of labor and power on farms 20 



Factors affecting the efficient utilization of power and labor on farms_ 42 



Choice of power 45 



The future use of power on farms 50 



Appendix I. Tables 53 



Appendix II. Selected bibliography 73 



Department Bulletin No. 1349. — The Brood-Rearing Cycle op the 

 Honeybee: 



Introduction 1 



Method 4 



Annual brood-rearing cycle 6 



Description of the colonies used in 1921 12 



Seasonal characteristics of 1921 13 



Brood rearing of a typical colony for two successive seasons 14 



General observations on the remaining colonies 16 



General discussion of the records for 1921 25 



Observations in 1920 27 



Migrations of the queen within the hive 30 



Compactness of brood nest 32 



Time relation of brood rearing to nectar gathered 33 



Egg laying. __ 35 



Conclusions 36 



Literature cited 37 



Tables 38 



Graphs 44 



