CONTENTS. 



Number 129. 



Page 

 Art. XYIII. — Abyssal Igneous Injection as a Causal Con- 

 dition and as an Effect of Mountain-building ; by R. 

 A. Daly 195 



XIX. — Some Interesting Beryl Crystals and their Associa- 

 tions ; by W. E. Ford 217 



XX. — Schistosity by Crystallization. A Qualitative Proof ; 



by F. E. Wright 224 



XXI. — Fractured Bowlders in Conglomerate ; by M. R. 



Campbell ... 231 



XXII. — Exploration of Samwel Cave ; by E. L. Furlong.. 235 



XXIII. — Occurrences of Unakite in a New Locality in Vir- 

 ginia ; by T. L. Watson 248 



XXIV. — Types of Permian Insects ; by E. H. Sellards... 249 



XXY. — Analysis of Dithionic Acid and the Dithionates ; by 



R. H. Ashley... _ "_ 259 



SCIENTIFIC INTELLIGENCE. 



Geology — Ueber Parapsonema cryptophysa Clarke und deren Stellung im 

 System. T. Fuchs : Phylogeny of the Eaces of Volutilitb.es petrosus, B. 

 Smith : Notes on some Jurassic Fossils from Franz Josef Land, brougbt 

 by a Member of tbe Ziegler Exploring Expedition, R. P. Whitfield, 263. 



Obituary — S. L. Penfield, 264. 



