628 



Jaggar — Activity of Mauna Loa. 



night. December 6, at half-past nine p.m., Mauna Loa cleared 

 off, showing a single slender column of fume with orange light 

 of about the same color as Halemaumau, rising rapidly in puffs 

 discernible even at this great distance (twenty-two miles) to a 

 height of about 6000 feet, and there spreading into a diffuse 

 mushroom or balloon of thin vapor, illumined ruddy. (Fig. 6.) 

 The topmost detectable glow reached to at least 10,000 feet 

 above the summit. The next morning, Monday, December 7, 



Fig. 6. 



at 8 a. m., Mauna Loa was revealed with a wide snow cap, and 

 from its middle rose a very slender column of white vapor, 

 diffused above into a bluish haze. On the next morning, 

 December 8, the mountain was brilliantly clear and showed 

 not the faintest trace of a fume column, and there was no 

 night glow seen, though the mountain was clear at 4 a. m., De- 

 cember 10. At 8.30 p. m., however, a faint glow showed and 

 this continued on the 11th. Dec. 12 there were faint fumes 

 in the morning and fumes with glow in the evening. Dec. 13 

 a compact cloud appeared over the crater in the morning, 

 there were light puffs rising at 5 p. m. and the glow was distinct 

 at night. 



We succeeded on December 15 in reaching Moknaweoweo 

 from the east side and taking photographs and notes of the 

 fountaining activity which continued there. 



There had now been five parties which reached the summit 

 area, and only one of these, the first, Messrs. Forrest and 



