VOLCANIC ACTIVITY OF LASSEN PEAK 



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I"ii;. I. SoiPAN Sfiungs Southwest of Lassen Peak. 



The falling matter must have been the stones and coarser material 

 in distinction from the fine ash forming the top of the column of 

 smoke. Professor Shaw's observation is the only one received by the 

 writer that indicates the lieight to which the heavier fragments were 

 thrown. " Tavo thirds " of the column would indicate a height of 8,000 

 feet. 



There seems to be entire agreement by all the competent observers 

 who were fortunately situated that in none of the eruptions has there 

 been any molten lava emitted. Sunset glow upon the steam clouds has 

 most probably accounted for some of the "flames" reported to the 

 newspapers. Samples of the ash were submitted to Professor A. S. 

 Eakle. of the Mineralogy Department of the University of California, 

 and his report follows. 



Fig. s. 'I'AitTAiti s Lake (Coiling Lakej in Hot Spuing Valley. 



