114 



VERNON C. ALLISON 



These three stalagmites, among others, are shown in Figures 

 9 and lo, and in three-quarters view in Figure ii. Vertical and 



Fig. 9. — Stalagmites Nos. 1,2, and 3 



Fig. 10. — Stalagmites Nos. 3, 4, and 5 



cross-sections of the three stalagmites studied are shown in Figures 

 12 and 13. The rate of growth is obtained from the "coal-dust 

 bands" appearing in the vertical section. The Kght part of stalag- 

 mite No. 3 is colored red with iron, as is its corresponding stalactite. 



