Fig. lo. Intense mnltiple fountaining of Halemaumau July 17-20, 1912, 

 looking W. From maximum depression of 329 ft. (100 m.) June 22, there 

 bad been strong rising to minimum depression 192 ft. (58 m.j July 12, fol- 

 lowed by subsidence to depression 273 ft. (84 m.) July 20. Thereafter subsi- 

 dence continued. 



(a) Daylight July 17. 1912. 9 a. m., shows inner pit of violently effervesc- 

 ing lake magma, surrounded by floor of bench magma which was fuming 

 and collapsing. Photo Jaggar. 



(b) Shows same scene at night, July 20, 1912, 10 p. m., exposure 1/5 sec, 

 streaming from right to left ; note increase in size, height and numbers of 

 fountains from right to left. Length of straight shore on l^ft 510 ft. (155 m.), 

 width of lake 325 ft. (99 m.). Larger fountains 25 ft. (762 m.) in diameter. 



(c) July 20. 1912, 10 p. m., same as (h) but longer exposure 2 sec, shows 

 rapidity of streaming towards left, down- suction at line of shore grottoes 

 and at zone of travelling fountains across middle ; crusts j)arting at right 

 shore; spatter, stalactite curtain, flame, and bombarded incandescent wall; 

 fume above. The same violent turbulence was present in (b) but short expo- 

 sure arrests motion. Photos J. T. Warren, Eastman film, aperture F 4*5. 



