1917] KRAYBILL—ALKALI SALTS 55 
11. It seems probable that caesium, potassium, and rubidium 
in the form of certain salts, such as the carbonates, sulphates, and 
phosphates, have a specific catalytic action in the combustion, 
and that the chlorides have a negative catalytic action. It is 
planned to study the rate of decomposition of various organic salts 
of the alkalies, and also the decomposition products of various 
organic substances treated with salts of the alkalies, when sub- 
jected to temperatures which are attained in the burning cigar. 
Acknowledgments are due to Dr. Wm. Crocker for many 
helpful suggestions and criticisms, and to Mr. Orro OLson of the 
United States Department of Agriculture for the = of tobacco 
used in this work. 
UNIVERSITY OF CHICAGO 
LITERATURE CITED 
1. BARTH, Max, Untersuchungen von im Elsass ~ gesozenen Tabaken und 
einige Beziehungen zwischen der Qualitat des Tabaks und seiner Zusam- 
. Landw. Ver. Stat. 7 ua he ok, 
2. BEHRENS, J., Weitere Beitrige zur Ker Tabakpflenze. Landw. 
Ver. Stat. 43: he 1895- 
3- CARPENTER, F. B., Types of tobacco and their analyses North Carolina 
State Agric. Exper. Bull. no. 122. 1895. 
4- GARNER, W. W., Th Se are OR Mae ee 
qualities of tobacco. Baloo. BaP nd US Dept. Agric. 
5. Hoser, M. R., Ph Gewebe. Leip 
und Berlin. 1914. i . oe 
6. Jenkins, E. H., Experi ir with different fertilizers. 
Ann. Rep. Conn. State Agric. Poy Sta. rugs 1895. 
7. Kisstinc, RicHarp, Die Chemie des Tabaks. Chem. Zeit. 8: 68. 1884. 7 
ie cc ee es aie 
