THE GREAT ERUPTION OF SAKURA-JIMA IN 1914. 167 



five years later, this time on the diametrically opposite southwest 

 slope {see ant 2, p. 42). On September 15th, 1475, a violent ex- 

 plosion occurred above Yuno at an altitude of 400 m. Another 

 version says that the fluent lava issued forth on October 6th, 1476.^^ 

 Lava welled out in streams, one branch spreading itself southeast- 

 wards on the mountain slope in an apron, while the southwestern 

 arm started from the vent,*^ No. 6 {t) of Geologic Map, ran d( -wii 

 directly to the shore and pushed further into the sea, thereby 

 creating the new point of Moyé-zaki (Text-fig. 4, cm.) or the 

 ' burning headland.' The area overflooded by block lava is a little 

 gi-eater than that of the earlier flow of Urano-mayé (p. 164). This 

 Byôbu-hira field'*^ still leaves a series of six perfect vents or Ixx'cas 

 (boche), which hitherto have l,>een unknown to the outside w^orld. 



No. 1. The uppermost pit'' (Text-fig. 34 [1]) is the typical 

 and the largest one, located at a height of 400 m. The inner 

 diameter is 30 m. and the circumference 200 m. with a depth of 

 40, the northwest rim being a little lower. As it is a blow hole, 

 the back side is clear-cut in the old ash-gray lava of Kita-daké, 

 a continuation of the Ogawara inlier (p. 154), and the fluent lava 

 escaped only over the low^er northwestern rim, as in No. 1 venthole 

 of the w^estern lava-field in the recent eruption (Text-fig. 27, p. 140). 



On the cliff" in the hollow (Text-flg. 34) a fresh slag- agglomerate 



1) See page 42. 



2) The vent No. 5 is named Takachiki (;^ ^]. 



3) ;^ Mi ^ :^ II?f A view of the ByObu-hira lava tielil may be seen in PI. XI. Fig. 3. 



4) The four pits from Nos. 1-4, counting from above, received the names Moyi-gowi (-^ 

 ^ or the ' burning bocca '), Shitano-moyéi/oivi (the ' lower bocca '), llehiga-Jmljo {^ if *^ or the 

 'snake's hollow') and lastly, SurUxichino-kiibo (^^ #|v / -^ or the ' mortar hollow ') respectively. 

 The road to the boccas leads up directly from Yuno, first entering into a block lava-field where 

 there are tico wind holes (the vents Nos. 4-5 in (Teologic Mai>) in depressions. A cellar is 

 especially built in each the above-mentioned depressions for the storage of egg-papers of silk 

 worms, as the cool and constant temperatures of ' blowing caves ' are favorable in keeping back 

 the untimely hatching of eggs. They seem to be terminal openings of lavantunnels with which 

 the above-mentioned two lower secondary ventholes (Nos. 3-4) had probably direct communication. 



