ENGINEERING 
628.5 Industrial sanitation 
51 Factories and trades 
SII Prevention of dust and fumes 
512 Protection of throat and eyes 
513 Protection against infection 
519 Special trades 
52 Effluvium nuisances 
521 Situation of works 
522 Use of high chimneys 
523 Condensation in water 
524 Combustion in furnaces 
520 Special trades 
23 Smoke nuisance 
538 From steam generators 
339 From special industries 
Disposal of solid and liquid wastes 
Discharge into streams 
Absorbing wells and burial 
Clarification by subsidence 
Chemical treatment 
Filtration 
Purification by the soil 
Special methods and special trades 
House drainage 
Rural water supply: villages and country houses 
Ventilation and heating 
This hed is chiefly for ventilation. Most matter on heating goes in 697 
See also Heating, Ventilation, in Relativ index following tables 
Lighting 
Por other relations and applications see Lighting in Relativ index 
Other branches of engineering 
Automotiv industries 
Air, land, water, treated together; for water craft alone see 623.8 
Aeronautics Aerial navigation 
Usual form division .09 to include general accounts of voyages, but class special 
voyage with type of machine used 
Aerostatics 
Aerodynamics, bird flight, soaring 
Meteorologic conditions; wind currents, etc. 
Aerodromes, flying grounds, parks 
Experiment stations, landing places, sheds, hangars 
Navigation 
Atmospheric roads, airways; aerial maps, topografy; airsickness; disasters 
Laws, international and local 
629 
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