162 Trans. Acad. Sci. of St. Louis. 



EXPLANATION OF ILLUSTRATION. 



Plate XXXVI; Figs. 1 and 2. Table for magnetic observations. 

 Plate XXXVII; Fig. 1. Steamer. Blast of Fog-born. 

 Plate XXXVII; Fig. 2. Wooden trough containing column of dyna- 

 mite. 

 Plate XXXVIII. Magnetic effect of a flame. 

 Plate XXXIX. Magnetic effect of a flame. 

 Plate XL. Magnetic effect of an explosion. 

 Plate XLI. Magnetic effect of sound-waves. 

 Plate XLII. Magnetic effect of sound-waves. 

 Plate XLIII. Magnetic effect of sound-waves. 



Issued July 28, 1916. 



