x CONTENTS 



SECTION IV. 



AIR AND VENTILATION. 

 Pages 76 - 109. 



AIR. Composition of air Pollution Oxygen decrease Carbon dioxide 

 increase Significance of carbon dioxide Heat and humidity Organic 

 and suspended matter Bad effects of impure air. 



VENTILATION. Amount of air required Cubic space General principles of 

 ventilation Natural ventilation Size of air inlets and outlets Methods 

 of ventilating buildings Inlets Wall windows Tobin tubes Inlet 

 pipes Air bricks Hit-and-miss windows Outlets Findlay's system 

 Skylights Ridge ventilators Outlet shafts Extraction cowls Louvre- 

 board ventilators Mechanical ventilation Plenum method Vacuum 

 method Ventilation of double-storied stables The King system of 

 ventilation Testing the efficiency of ventilation Estimation of carbon 

 dioxide Angus Smith method Lunge-Zeckendorff method Suspended 

 matter Bacterial content Physical state of atmosphere. 



SECTION V. 



BUILDING CONSTRUCTION. 

 Pages 110-192. 



DRAUGHTSMANSHIP. Materials required Practice Surveying buildings 

 Choice of sites Farm buildings Town buildings Arrangement of farm 

 buildings on the site. 



BUILDING MATERIALS. Bricks Tiles Building Stones Igneous rocks 

 Sedimentary rocks Slates Limes Mortars Cements Concrete 

 Asphalts Felts and bituminous roof coverings Timber for building 

 purposes Defects in timber, dry rot, &c. 



CONSTRUCTION OF WALLS. Brick walls Stone walls. 



CONSTRUCTION OF ROOFS. Couple roofs Framed roofs Steel trusses. 



CONSTRUCTION OF FLOORS. Foundations Bottoming Cement concrete Whin- 

 stone and granite setts Paving bricks Asphalt Porous bricks Wood. 



CONSTRUCTION OF STABLES FOR HORSES. Arrangement Stalls Passage Air- 

 space Ventilation and lighting Flooring Walls Doors Stall 

 divisions Bails Mangers Hay-racks Water pots Yard troughs 

 Loose-boxes Horse fastenings Harness room Food store and food 

 preparation room Artificial light. 



CONSTRUCTION OF COW-SHEDS. Types of byres and general arrangement Stalls 



Slope of stalls Flooring of stalls Drainage of byres Milking passage 

 Air-space Floor-space Food-troughs Watering Stall divisions 

 Lighting and ventilation Walls Doorways Food and manure carriers 



Securing cows Calf houses Food preparation room Milking-shed 



Milk-house. 



CONSTRUCTION OF PIGGERIES. Types of piggeries and general arrangement 

 Lighting and ventilation Fittings of pens. 



