368 



workers and of individuals who liave had experience in the making of 

 indexes has been sought. Especial acknowledgment is made to Dr. 

 Goodell of Massachusetts and Dr. Frear of Pennsylvania, who acted 

 as a conunittee of the Association of American Agricultural Colleges 

 aud Experiment Stations to aid this Office in defining its plans fof the 

 index. Many opinions regarding the arrangement of the index have 

 been brought out, and it is not expected that in its present form it will 

 meet all the varied requirements of individual Avorkers. It is expected, 

 however, that experience will show that the plan adopted will meet the 

 needs of students of agricultural science as far as could reasonably be 

 hoped. 



The index of current American station literature begins with the year 

 1890. Work has also been begun on the past American literature 

 and will i)roceed from 1890 back to the beginning of investigations in 

 agricultural science in this country. As soon as practicable foreign 

 literature will be taken up. 



The general phm on wliich the index will be constructed maybe 

 briefly outlined as follows: The subjects with which agricultural 

 science deals liave been grouped under a limited number of general 

 topics. These topics have been divided and subdivided only so far as 

 seemed necessary to fiicilitate references to the individual entries of 

 the index. The classification adopted is as follows: 



(1) General sciences. — Plijsits, cluMiiistry, mineralogy, geology, botany, bactori- 

 ology, animal pliysiology, zoology, meteorology. 



(2) Air and rvaler. 



(3) Soil. — Historj- and classification, physies, chemistry, tillage, methods ol' inves- 

 tigation . 



(4) Fei-tilizcrs. — History, natnre, aud uses, farm manures, commercial lertilizer<. 

 experiments, insitertion. 



(5) Plants. — Field crops (history and uses, species and varieties, composition, cul- 

 ture, manuring, curing and storage, and rotation), horticulture (vegetables, orchard 

 friiits, email fruits, grapes, nuts, lantlscape g^rdening^ and doriculture), forestry, 

 seeds, weeds, diseases of plants (parasitic, non-parasitic, remedies). 



(6) Foods (for domestic animals and man). — Comjiosition aud valuation, nutritive 

 values, preparation and use, food accessories, beverages, adulteration. 



(7) Animals. — History and general principles, breeds aud breeding, animal jiro- 

 duction (cattle raising, dairy farming, sheep husbandry, swine husbandry, horse* 

 and mule husbandry, aviculture), veterinary science .ind practice. 



(8) Economic entomology. — Beneficial insects (apiculture and sericulture), injuri- 

 ous insects (affecting animals, aff'ccting plants, insecticides, insecticide appliances). 



(9) Dairying. — History .and general principles, composition aud properties of milk 

 aud its products, changes in milk (fermentative changes due to l>acteria, etc., and 

 creaming), handling of milk, inspection, butter making aud creameries, cliecso 

 making and factories. 



(10) Technology. — Milling, starch, sugars, fermented liquors, fot^s and oils, tex- 

 tiles. 



(11) Agricultural engineering. — Properties of materials, drainage, irrigation, farm 

 inipleuieuts, roads aud bridges, fences, farm buililiu^s. 



(12) Station statistics. — History and organization, legislation, equipment, (appa- 

 ratus, buildings, farms, implements, live stock), finances, bibliography. 



(13) MiacellaneouB. — Rural economy, agricultural education, .igricultural statia- 

 tics. 



