418 ANNUAL REPORTS OF DEPARTMENT OF AGRICULTURE. 



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

 foreman's residence for the Bure:iu of Plant Industry at Sacaton, 

 Ariz. This latter was designed particularly to meet conditions pre- 

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

 ance to ranchers and others in future building operations in Arizona 

 and other arid sections. 



An inspection was made of the oflices 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 was 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 with the Division of Animal 

 Husbandry. 



An illustrated yearbook article, " Housing the Worker on the 

 Farm," was prepared and published as a separate. 



A number of informal talks Avere given before demonstration agents 

 in the South on rural housing. 



The architect of the division was detailed from August 1, 1918, 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 boll 

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

 cooperation with the Bureau of Entomology. ' ' 



For the purpose of obtaining data a number of private hydro- 

 electric installations were inspected. 



Drawings for several pieces of chemical apparatus w^ere 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 valve control. 



A yearbook article on "Electricity and power from small streams " 

 was prepared and published as a separate. 



Manuscripts and numerous drawings for illustrations for bulletins 

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

 " Farm Plydro-Electric Plants " Avere started but the Avork Avas not 

 completed. 



Farmers' Bulletin I^o. 991, Avhich is number five of the series " Care 

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



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

 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 work was turned over to the Division of 

 Rural Engineering and has been handled Avithout any 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 was taken 



