m~ Index XI-XX, now ready. Price $1.00. 



CONTENTS. 



Page 



Art. XVIII. — 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. — Schistose 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. II. Sellards... 249 



XXV. — 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 Volutilith.es petrosus, B. 

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

 by a Member of the Ziegler Exploring Expedition, E. P. Whitfield, 263. 



Obituary — S. L. Penfield, 264. 



