Jaggar — Activity of Ala una Loa. 627 



outbreak. Nevertheless it appeared certain that the active 

 area had decreased. There were two well-marked columns of 

 rising fumes, the southern larger and better illuminated. 

 Usually these were separated by a blank space of clear sky, but 

 at times illuminated drifting fumes intervened. 



On November 27, by day only brief glimpses of the top of 

 the fume column were obtained. At night the scene was 

 essentially unchanged, though somewhat more spectacular than 

 on the previous evening. 



On November 28, forenoon views were like those of the pre- 

 ceding days. Heavy rain set in about noon and there was no 

 further seeing. 



On November 29, no view was obtained till late afternoon 

 and evening. The summit was seen to be covered with snow 

 down to about 12,000 feet. There was no significant change 

 in the action from that seen on Friday evening, November 27. 



On November 30, at about 10 a. m. the north fume column 

 was seen to be very much lessened. At night in bright, hazy 

 moonlight the display was brilliant and quite as spectacular as 

 at any time except the first evening and night. Nevertheless 

 the output of fumes was less than on the preceding evenings. 

 The south column of fumes was much the larger, and better 

 illuminated. The dark space intervening between it and the 

 north column was occasionally filled with drifting fumes well 

 lighted. 



On December 1, an overcast day with very high clouds, the 

 fumes showed faint brown tints against the cloud background 

 in early forenoon. A stratum of very thin, cerulean blue 

 fumes, with a faint but distinctly defined limiting plane at the 

 bottom, rested upon the mountain above, about 10,000 feet. 

 In the afternoon only the south fume column was any longer 

 visible. This rose, straight and slender, from 9,000 to 10,000 

 feet above the summit, and there a ragged cumulus crown hung 

 stationary in a streaked, wavy network of blue haze. In the 

 evening the slender fume column was faintly illuminated and 

 soon obscured by drifting clouds. 



On December 2, no view was obtained until evening. Then, 

 at first the single south fume column appeared dimly lighted, 

 almost invisible in the bright light of the full moon, but soon 

 fiimes appeared to be rising more copiously and more rapidly 

 and the column became very brilliantly lighted, as much so as 

 at any time except on the night of outbreak. 



Seen from the Observatory, on December 3 in the evening, 

 Manna Loa cleared under high clouds, showing a single smoke 

 column more voluminous than on previous days and more 

 spectacularly illuminated. December 1 and 5 there was rain, 

 but a faint diffused illumination of the cloud cap was seen at 



