Jaggar — Volcanologic Investigations at Kilauea, 191 



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Fig. 16. Jan. 16, 1917. Details of lake surface and rampart grotto at 

 time of experimental work. Depression 78 ft. (24 m.). Photos Jaggar, 

 taken fi'om lake shore. 



(a) Heavy crusts of lake surface folding downward along line of small 

 fr>untains 50 ft, (15 m.) away. 



(6) Rampart grotto with splashing fountain 30 ft. (9 m.)_from observer. 

 Iron pipe for experiments shown in lower left corner both pictures. 



