124 ART. 3. — B. koto: 



ing black compact lava mixed with juvenile lava, superimposed by 

 h) a coarse admixture of lapilli and sand. Near the upper horizon 

 the writer, to his surprise, picked up white porcelain-like splinter 

 blocks, which under close examination were found to be the in- 

 teresting cordierite-bearing éjecta to which special description will 

 be given under the new name of ceramicite. It is remarkable that 

 it constantly recurs in the same horizon elsewhere, c) The upper 

 13 cm. of the deposit is composed of ash mixed with little sand. 



The above profile tells the order of volcanic ejections begin- 

 ning with coarse and closing with fine materials. The lower 

 portion of the (a) deposit is of projectiles during the explosive 

 phase, while all the r(^st are the products of the eruptive period. 

 The new deposit affords good ground and is pleasant to walk 

 over, being a typically macadamized terrene covered with moist 

 fine ash which coats hills, mountains and valleys alike. 



What is said in the foregoing chiefly refers to the normal 

 deposit. On the west, however, abnormal conditions prevailed. 

 Here the first paroxysm seems to have been an extraordinary one, 

 scattering rough blocks of 1.2 m. diameter, of old compact and 

 new pumiceous lavas on the shore between Akamizu and Akobara, 

 at a distance of 2 km. fi'om the vents. The loose pile of about 

 l.Zm. was coated with 1.3 c??z. of ash sheet. The ground here is 

 of roughest character and very unsteady (PL V. Fig. 2) in contrast 

 to the east (Text-fig. 25). 



DispEBsAL ^^^^ mode of dispersal of the éjecta was mainly in- 



fluenced by the direction of the wind, especially the 

 coarser particles, which were under the direct control of varying 

 local winds. A photographic picture taken a few minutes after 

 the first eruption (Jan. 12tli, 10.20 a.m.) unequivocally shows the 

 wind veering at that time to northwest (Frontispiece and Text-fig. 



