CONTENTS. 



Page. 



Introduction 7 



Effects of the various constituents of tbe ash on the burning qualities of 



tobacco 14 



Potassium 15 



Calcium 16 



Magnesium 17 



Mineral and organic acids 18 



The character of the ash 21 



The relation of the organic constituents to the burning qualities 22 



Summary 21 



Index 27 



105 



5 



