22G CONTEXTS. 



PAGE 



Melting raiioro of the Mihara-yania lav^a by Fuji and 

 jNIizognclii, 111 — Melting experiments of the same by 

 Tawara, 112 — Summary on melting experiments, 113 

 — Block-lava and bread-crust bombs, 114 — Secondary 

 exhalations, 114 — Fumaroles, 115 — Lava-flows in sea, 

 115 — The tromba, 115 — -Temperature of sea- water, 

 116— Boiled fishes 116 



vi. Lapilli, ashes and sands 117 



The ashes, 117 — Crystal-lapilli, 118 — Magma-glass 

 ashes, 119 — Tiic sands, 119 — ^Cauli flower-shape of 

 dust-clouds, 119 — Resurgent and juvenile sands and 

 ashes, 120— The lapilli, 120— Slag-lapilli, 120— 

 Characters of eastern and western lapilli, 120 — Che- 

 mical composition of ash, 121 — Acidity of ashes, 122 

 — Deposition of eje.-ta, 123 — Disjiersal of ejeata, 124 

 — Dust in the upper stratosphere, 126 — -Amount of 

 éjecta 127 



vii. Subsidence of tJie Sakura-jima environs 127 



Relcvelings of the Ordnance Departuient, 128 — Curves 

 of equal subsidence, 130 — The Mino-Owari earth- 

 quakes of 1891, 131 — Cause of the subsidence, 133 — 



Smnmary, 135 — Local isostatic vulcanism 137 



viii. Vcntholes 137 



A view that the series of vents located on mere 

 surficial fissure of the crust, 139— Western ventholes, 

 139 — Eastern ventholes, 142 — Meclianism of the re- 

 cent Sakura-jima eruptions, 143 — Satellitic injeotion- 

 clmmber 145 



ix. The spatter eruption and the formation of a dome . . 146 

 The Yuno-hira dome, 147 — ^Mode of eruption of No. 



5 vent of Nabé-yama 148 



x. Sublimation-products 149 



Lava-sublimates, 149 — Salmiac, the principal subli- 



