NDEX. 



Fage. 



Acids, organic, relation to burning qualities 22 



salts, effects on burning qualities 18 



Alkalinity of ash, relation to burning qualities 20 



Ash constituents, effects on burning qualities 14 



relation of alkalinity to burning qualities 20 



Breeding, improvement of burning qualities by selection 21 



Burning qualities, meaning of term 8 



Calcium salts, effects on burning qualities 16 



Cellulose, relation to burning qualities 22 



Cblorids, effects on burning qualities 18 



Combustion process in tobacco and burning with a flame, differences 8 



Composition of leaf, relation to burning qualities, previous investigations- 10 

 Extraction of tobacco with various solvents, effects on burning qualities-. 13, 23 



Extracts of tobacco, water, composition 14 



Fertilizers containing magnesia, use 25 



Flame, burning with, and combustion process in tobacco, differences 8 



Improvement of burning qualities, objects to be attained 21 



Leaf, composition, relation to burning qualities, previous investigations.- 10 



Lime, effect on character of ash 22 



Magnesium salts, effects on burning qualities 17 



Nitrates, effects on burning qualities 18 



Nitrogenous constituents, conditions favoring excessive production 25 



relation to burning qualities 23 



Organic acids, relation to burning qualities 22 



salts, effects on burning qualities 18 



constituents, relation to burning qualities 22 



Phosphates, effects on burning qualities 18 



Potash, effect on character of ash 21 



fertilizers, effects of different forms on composition of ash 24 



for tobacco, available sources 24 



partial replacement by lime and magnesia 19 



Potassium salts, effect on burning qualities 15,19 



Sulphates, effects on burning qualities 18 



Sulphur in tobacco, two forms 10 



Tars, tobacco, relation to burning qualities : 23 



Water extracts of tobacco, composition 14 



105 



27 



o 



