BAIRD &TATLOCK. (LONDON) LTD. 



5992 s Diagrams, to illustrate hygiene, suitable for class work. Size 40 by 30, on cloth, coloured. 



Nos. i to 20 4/- each, 21 to 24, on Cartridge 30 by 22, 2/-. 



1. Source and Circulation Physical and Chemical 



Properties and Natural Phenomena. 



2. Pollution by Air, Soil, Animals, Storage, Shallow 



Wells and Distribution. 



3. Purification Separation, Distillation, Softening, 



and Filtration, showing New River Company's 

 Filter-bed. 



4. Soils and Water Water-bearing Strata and 



Means of Access, showing Section of London 

 Basin. 



5. Fittings for Storage, Supply, and Flushing. 



6. Radiation, Conduction, and Convection 



Stoves and Grates. 



7. Ventilation Natural, Artificial, and System at 



House of Commons. 



12. Drainage Good and Bad Systems contrasted. 



13. Model Sanitation Copy of Model at the Parkes 



Museum. 



14. Drainage Systems for Detached, Semi-detached, 



and Attached Houses. 



15. Traps Defective and Approved. 



I5a. Sewage Disposal Systems including Bac- 

 teriological Methods. 



16. Conservancy Systems Pails, Privies, Middens, 



and Destructors. 



17. Disinfection by Steam, Chemicals, and Fumi- 



gants. 



18. Bacteriology Elementary and Diagrammatic. 



19. Meteorology Cyclones, Anti-cyclones, Rainfall, 



etc. 



20. Clothing of Head, Feet, Body, and Furnishing. 



21. Proximate Principles of Food. 



22. Dietaries. 



23. Constituents. 



24. Elements and Compounds of the Human Body. 



400 



8. Air Chemical, Physical, Physiological, and 



Statistical. 



9. Interception and Inspection of Drains, Waste 



Pipes, etc. 



10. Water Closets -New and Approved. 



11. Water Closets Old and Condemned. 



5993 T Complete Set in Case with Diagrammette Book 

 5994 s Additional Diagrams, on Cartridge 30 by 22 in. 



25. Set of Four Diagrams illustrating London County Council Requirements the set 080 



26. Grease Trap, with Flushing Tank . . . . . . . . . . ..026 



28. Drain Pipes Patent Joints . . . . . . . . . . .,026 



29. A large Diagram of Parkes Museum Model, 40 by 30 . . . . . . 026 



30. Ditto Water Pollution, 40 by 30 .. . . . . . . . . . . 026 



5995 s Hygiene Demonstration Models. 



No. i. House Sanitation. The first copy of this model was made for the Sanitary 

 Institute, Parkes Museum, and since its introduction has been made and supplied to 

 nearly all technical education centres both in England and abroad. 



It can be used to demonstrate siphonage of traps in valve and wash-down closets, 

 the effect of ventilation and no ventilation, compression of air, momentum of flush, 

 protection of traps by anti-siphonage pipes, the effect produced by flushing from a 

 siphon flushing cistern, and the proper position for connecting anti-siphonage pipe to 

 soil pipe . . . . . . . . . . . . . . . . ..330 



No. 2. House Sanitation. Similar to No. i, but with the ventilation shaft carried higher 



than the top closet and the soil pipe terminal being provided with a mica flap inlet . . 3 10 



No. 3. House Drainage and Sewer. This large model includes the two models Nos. 

 I and 2, as described, and in addition gives a length of sewer about 8 ft. long by 

 ii in. diameter, with three manholes. It also is provided with a reservoir at both ends, 

 from the upper of which the water can be made to represent the effect of a storm of 

 rain or sudden influx of water, and the subsequent subsidence and partial vacuum 770 



No. 4. House Drainage. This model is built up in a very practical way, with J scale 

 pipes, traps, bends, junctions and channel, with a model inspection chamber, air- 

 tight cover and fresh-air inlet ; concrete under the drain, and the soil is filled in up 

 to ground level. The whole showing a well-constructed drain in section . . . . 3100 



No. 5. Expansion of Air. A model for demonstrating the effect of expansion and 



contraction of air on the water seal of traps . . . . . . . . . . 0126 



No. 6. Permeability of Soils. A model to show the ready passage of air through soils 1 10 



1093 



