418 ANNUAL REPORTS OF DEPARTAIENT OF AGRICULTURE. 



Bureau of Animal Industry, a garage and shed, a greenhouse, and a 

 foreman's residence for the Bureau of Phmt Industry at Sacaton, 

 Ariz. This hitter was designed particuhirly to meet conditions pre- 

 vailing in the arid sections, and it undoubtedly Avill prove of assist- 

 ance to ranchers and others in future building operations in Arizona 

 and other arid sections. 



An inspection was made of the offices of the Bureau of Crop Esti- 

 mates, and inspection and advice given relative to the design and con- 

 struction of a large manure pit at the United States Soldiers' Home. 

 The construction of the Color Investigations Laboratory at Arling- 

 ton AYas supervised for the Bureau of Chemistry. 



The preparation of the manuscript for a bulletin on the Farm 

 Shop and Equipment was begun. 



A number of designs were prepared for use in a bulletin on cattle 

 feeding to be published in cooperation Avith the Division of Animal 

 Husbandry. 



An illustrated yearbook article, " Housing the Worker on the 

 Farm." Avas prepared and published as a separate. 



A number of informal talks Avere giAen before demonstration agents 

 in the South on rural housing. 



The architect of the division Avas detailed from August 1, 191S, to 

 April 1, 1919, to the Building Materials Division of the United 

 States War Industries Board to assist in the preparation of standard 

 specifications and details for building construction. 



MECHANICAL PROBLEMS. 



The dust-spraying apparatus for dusting cotton plants for boil 

 weevil, designed during the pervious year, Avas further developed in 

 cooperation with the Bureau of Entomology. 



For ihe purpose of obtaining data a number of priA'ate hydro- 

 electric installations Avere inspected. 



DraAvings for several pieces of chemical apparatus were prepared 

 for the Bureau of Chemistry, including an air-cooled gas reaction 

 apparatus, laboratory gas reaction apparatus, metal baths, a 

 phthalic anhydride plant, condensers, automatic valA'c controh 



A .yearbook article on "Electricity and poAver from small streams " 

 Avas prepared and published as a separate. 



Manuscripts and numerous drawings for illustrations for ])ulletins 

 on " Farm House Heating Plants," '' Farm House Lighting,'' and 

 "Farm Hydro-Electric Plants" Avere started but the work Avas not 

 completed. 



Farmers' Bulletin No. 991, Avhich is number five of the scries " Care 

 and Repair of Farm Implements." Avas prepared and published. 



The chief of the division, assigned to the Secretary's comhiiltec 

 on farm equipment control, did considerable Avork in this connection 

 during the year. Upon the resignation in the spring of 1919 of the 

 official in charge, all of that Avork Avas turned over to the Division of 

 liural Engineering and has been liandled Avithout anv addition to 

 funds or personnel of the division. 



During the season of 1918 the United States Food Administration 

 conducted a campaign looking to the conservation of grain through 

 improved methods of grain thrashing. Upon the termination of the 

 Food Administration's activities the grain saving Avork Avas taken 



