CONTENTS. 



Page 



Art. XXIII. — Topographic Features Formed at the Time of 

 Earthquakes and the Origin of Mounds in the Gulf 

 Plain ; by Wm. H. Hobbs 245 



XXIV. — Contributions to the Geology of New Hampshire, 

 No. III. On Red Hill, Moultonboro ; by L. V. Pirsson 

 and H. S. Washington 257 



XXV. — Developmental Stages in Streptelasma rectum Hall ; 



by T. C. Brown. 277 



XXVI. — A New Fly (Fam. Mycetophilida?) from the Green 



River Beds ; by T. D. A. Cockerell 285 



XXVII. — Marignacite, a New Variety of Pyrochlore from 



Wausau, Wisconsin ; by S. Weidman and V. Lenher 287 



XXVIII. — Arsenate Process for the Separation of Magne- 

 sium and the Alkalies ; by P. E. Browning and W. A. 

 Drushel 293 



XXIX. — Chemical Composition of Molybdic Ocher ; by W. 



T. Schaller 297 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Preparation of Pure Helium, Jacquerod and 

 Perrot : Calcium as an Absorbent of Gases, Soddy, 304. — Method for 

 Determining Halogens in Organic Compounds, E. Chablat : Hydrates in 

 Aqueous Solution, H. C. Jones, 305. — Entmcklungsgeschichte der Cheniie, 

 A. Ladenburg, 306. 



Geology and Mineralogy — Geological Survey of Canada, 306. — Cruise of the 

 Neptune, A. P. Low, 307. — Geological Survey of Brazil : Geological Com- 

 mission, Cape of Good Hope, 308.— rSeismic Geology, W. H. Hobbs, 309. — 

 Die Fossilen Insekten, A. Handlirsch, 311. — Geology of the Cape Lis- 

 burne Eegion, Alaska, A. J. Collier : Die Trochilisken, A. Karpinsky. 

 314. — Echinoderma, Miss M. Grant : Die Ostbaltischen Silurischen Trilo- 

 biten, Fr. Schmidt : The Genus Fusulina, H. Yabe : Palaeontologia 

 Universalis : Primary Septa of the Rugosa, J. E. Duerden and R. G. 

 Carrdthers, 315. — Marine Trias, Zacatecas, C. Burckhardt, 316. — La 

 Faune Jurassique de Mazapil, C. Burckhardt, 317. — La Fauna de Molus- 

 cos de Cardenas, E. Bose, 318. — Strenuella strenua, H. W. Shimer : Black 

 Sands of the Pacific Slope in 1905, D. T. Day and R. H. Richards, 319.— 

 Mineralogia Groenlandica, O. B. Boggild, 320. 



Miscellaneous Scientific Intelligence — British Museum Publications : Report 

 of the Surveyor of Hawaii, 321. — The Bureau of Science, Manila, Paul 

 C. Freer : Bulletin of the Imperial Earthquake Investigation Committee, 

 Tokyo, 322. — Manual in Physical Geography, C. T. Wright : Symposium 

 on Water Supplies in Michigan : Astronomical Observatory of Harvard 

 College Publications, 323. — Publications of the Washburn Observatory, 324. 



Obituary — Henri Moissan : P. E. M. > Berthelot : Wilhelm von Bezold : 

 Marcel Bertrand : Nicolas Sokolov : John K. Rees : Henry D. Todd : 

 W. J. Rhees, 324. 



