326 HARRY O. WOOD 



From about 8:30 a.m. on, short-lived, subordinate columns, 

 wisplike in appearance, were noted at points a little higher up the 

 slope than previously and at points much farther down the slope 

 also, over a span from five to seven times as great as the width of 

 the fume column at its greatest. These lateral columns did not 

 persist individually, and gradually they ceased to appear. 



Until the smoke began to fray and spread out like a blanket, 

 the columns of upcurling fumes were fleecy white in appearance 

 in the bright morning sun, with cream tints also, like cumulus 

 cloud; and so too was the cumulus crown. As the blanket spread, 

 however, it shadowed first the column and then its own lower 

 surface, so that these shaded portions took on a faint, graduated 

 coloring in which brownish and purplish tones of a faded-out 

 quality were commingled with various shades of gray. This 

 coloration developed quickly with the horizontal outspread of the 

 fumes. No truly dark-colored fumes were seen. 



After the cumulus crown had risen into the upper air and had 

 begun to fray and drift eastward, such action continued until the 

 lessened emanation of the fumes brought it to an end, late in 

 the forenoon. Altogether, however, only a small percentage of the 

 fumes reached the uppermost levels. Most of the drift was to the 

 northwestward. By 8:00 a.m. this tendency for the horizontal 

 fume-cloud blanket to draw out in the northwest direction was 

 noted. By 9 : 30 the drift in this direction of the blanket as a whole 

 had become noticeable, and by 10:30 such shifting was marked. 

 This spreading and drift of the cloud blanket to the west and 

 northwest until it stretched out back of the mountain profile, so as 

 to extend below the skyline, made a cloud-colored background 

 against which were rising the cloud-colored fumes, slightly tinted 

 with brown. This made the fuming very hard to see, but there is 

 no doubt of its rapid and progressive diminution after 8:00 a.m. 

 During the afternoon no rising fumes were seen definitely. But 

 for a very short time, just at sunset and after, very thin, translucent 

 fumes were seen, brown in the transmitted light of the western sky. 



In the early evening there was cloud and mist intermittent with 

 brief, clear glimpses. From the observatory no definite glow 

 could be seen, but there appeared to be a very faint radiation of 



