Fig. 14. Aug. 23, 1910, 8 p. m. From the north. Grotto, dome, and 

 openwork fountains. Telephotographs with large Dallmever lens, aperture 

 F3"8, 1/50 second exposure. Lake depression 345 ft. (105 m.). Photo Jaggar. 



(a) Night view of distant shore shown in fig. 6a. magnified. Central and 

 border dome fountains, and in background interior of very large half-dome 

 grotto overhung by spatter rampart, with curtain of stalactites on each side. 

 The hazy interior above is flame. The central fountain slowly migrated to 

 the grotto. 



(6) Openwork of nearer large fountain, bursting in north cove. Shows 

 multiple expanding bubbles of glass, not detectable by eye. Fountain 

 approximately 30 ft. (9 m.) high, seen from above at a high angle. Note 

 decrease of blurring motion and of luminosity from center of explosion 

 below to upward limit of fling. Solidification in air is taking place. Such 

 bubbles do not explode to fragments but expand within a ropy network. 



