CONTENTS. 229 



PAGE 



3) The cehamicites, natural porcelain ejocta, 196 — TIk; 

 ürst type, a saeeharoidal niodifieation, 198 — ^ïlie second 

 type, a vesicular lithoidal uiodification, 199 — ïlic 

 third (normal) type, a compact lithoidal, porcelain-like 

 modification, 200 — Chemical composition, 201 — The 

 fourth type, 202 — ^The fifth type, a gray jaspilite-like 

 modification, 202 — Origin of ceramicitcs . . . . 203-308 



4) Solid ejected blocks ov .tuvexile lava 209 



5) Bread-crust bombs 209 



G) Recent lapilli (western and eastern) 211 



7) Porphyritic obsidian 212 



8) PSEUDOBOMBS OF ANCIENT LAVAS («, ß, )' and £ typCs) 212 



9) Ejecta of trass or asli-stone, (a) balls, (/>) fragments. 214 



10) The so-called sandstones (glass soaked lapilli.) . . 216 



11) Ejected blocks of biotite-granite 218 



12) Coal 218 



13) Sü:sdiary on the Loose Ejecta 219 



