BUREAU OF PUBLIC ROADS. 391 



Complete plans and specifications were prepared for the color 

 investigations laboratory and the laboratory building for the Bu- 

 reau of Public Roads, both at the Arlington Farm. 



A number of farmstead layouts for individual farms have been 

 made. 



Manuscript for a bulletin on farmstead planning, including four 

 typical layouts, has been completed, and is awaiting approval. 



MECHANICAL PROBLEMS. 



A compressed-air spraying outfit was designed, built, and tested 

 out, by this Office. 



A survey was made for a small hydro-electric plant near Vi- 

 enna, Va. 



A dust-spraying apparatus for use in dusting cotton plants for 

 the eradication of the boll weevil was designed and public patents 

 are being secured. 



A hot-water heating layout was prepared for a farm home in 

 Ohio. Accurate cost data are to be kept by the owner and furnished 

 this office. 



Farmers' Bulletins 946 and 947, on the Care and Repair of Plows 

 and Harrows, and the Care and Repair of Mowers, Reapers, and 

 Binders, have been published.' 



Manuscript for a Farmers' Bulletin on the care and repair of 

 thrashing machines was prepared. 



Short articles have been prepared for distribution on general di- 

 rections for the installation of hydraulic rams; operation and wir- 

 ing diagrams for electric bells; memorandum on the construction 

 of ice houses, and iceless refrigerators. Small sketch plans have 

 been made, in many instances, to accompany correspondence regard- 

 ing proposed ice houses, and cold-storage rooms construction. 



Problems relating to and correspondence in connection with the 

 following subjects have been handled : 



Hydro-electric installa- Wall plasters and kalso- Concrete. 



tions. mines. Fire proofing. 



Farm-bouse lighting sys- Farm water supplies. Chemical closets. 



terns. Farm sewage disposal. Farm implements. 



Farm-house heating Locating water supplies. Tractors and gas engines. 



plants. Small grain-grinding out- Fence posts and fencing. 



Ice-h6use design and con- fits. Farm-machinery patents. 



struction. Self feeders for hogs. Cost of fencing. 



Wind-mill electric outfits. Grain-products manufac- Thrashing machines. 



Power development of ture. Stump pullers. 



streams. Homemade farm imple- Rotary tillers. 

 Refrigerating plants. ments. Protection against light- 

 Cold storage on the farm. Stream measurement. ning. 

 Farm structures of all Paints and painting. Cost of agricultural im- 



kinds. Farmstead planning. plements. 



Information series for use in correspondence have been prepared 

 during the year on the following subjects : Department of Agricul- 

 ture publications pertaining to agricultural engineering; cement or 

 concrete products machinery manufacturers; grain products manu- 

 facture, grain handling, storage, etc.; housing; storage structures, 

 fruit and vegetables; poultry; castor oil; damp proofing, concrete 

 walks, etc. J ventilation of farm structures; fence posts. 



