Vlll CONTENTS. 



NnmlDer 84. 



Page 

 Art. XXXVII. — Instance of the Action of the Ice-sheet upon 

 Slender Projecting Rock Masses ; by W. H. Hobbs. 

 (With Plate IX) 399 



XXXVIII. — New Species Melanochalcite and Keweenawite. 

 With Notes on some other known species ; by G. A. 

 KOENIG _ 404 



XXXIX.— Studies in the Cyperacese ; by T. Holm „.. 417 



XL. — Chemical Composition of Dumortierite ; by W. E. 



Ford _ _ _._ 426 



XLI. — Characteristics of Kau ; by J. S. Emerson 431 



XLII. — Titrimetric Estimation of Nitric Acid ; by I. K. 



Phelps 440 



XLIII. — Clays of the Boston Basin ; by R. M. Brown 445 



XLIV.— New Form of Calcite-Sand Crystal ; by E. H. Bar- 

 bour and C. A. Fisher __ 451 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Transformation of Carbon into Diamond, A. 

 LuDWiG : lodometric Titration of Thiocyanic Acid, Thiel, 455. — Iodine 

 Pentafluoride, Moissan : Separation of Manganese from Magnesium, Zinc, 

 and Aluminum, Dietrich and Hassel : Plasticity and Adhesiveness of 

 Glass at Ordinary Temperatures, Piccard, 456. — General Principles of 

 Physical Science, A. A. Notes : Lehrbuch der Allgemeinen Chemie, W. 

 OsTWALD : Spectra of Hydrogen and Eeversed Lines in the Spectra of 

 Gases, J. Trowbridge, 457. — New Holtz Machine, H. Wommelsdorf : 

 Electrical Conductibility of Metals and their Yapors, E. J. Strutt : Ioniza- 

 tion of Nuclei Produced by Violent Agitation of Dilute Solutions, C. 

 Barus, 559. — Handbuch der Spectroscopic, H, Kayser, 460. 



Geology and Natural History — United States Geological Survey : Geological 

 Survey of Kansas ; Special Eeport on Mineral Waters, E. H. S. Bailey : 

 Quantitative Chemico-mineralogical Classification and Nomenclature of 

 Igneous Eocks, W. Cross, J. P. Iddings, L. P. Pirsson and H. S. Wash- 

 ington, 461. — Petrography and Geology of the Monzoni region in Tyrol, 

 Eomberg : Gesteinskunde fiir Techniker, Bergingenieure, etc., F. Einne, 

 463. — Terlingua Quicksilver Deposits, Brewster County, Texas : Notes on 

 New Minerals, 464. — Gold in Meteorites, Liversidge, 466. — Triassic 

 Ichthyopterygia from California and Nevada, J, C. Merriam, 467. — 

 Zoological Eesults based on material from New Britain, New Guinea, 

 Loyalty Islands and elsewhere, A. Willey, 468. 



Miscellaneous Scientific Intelligence — National Academy of Sciences, 468. — 

 American Association for the Advancement of Science : Smithsonian Insti- 

 tution, Annual Eeport for 1901 : United States National Museum : British 

 Museum ; Catalogue of the Collection of Birds' Eggs : United States Coast 

 and Geodetic Survey, 469.— United States Naval Observatory : Bureau of 

 American Ethnology : Ostwald's Klassiker der Exakten Wissenschaften : 

 Hodgkins Gold Medal Awarded, 470. 



Obituary — Dr. Ogden Nicholas Eood : Dr. Egbert C. Kedzie : Dr. Egbert 

 Etjbenson ; John Hall Gladstone, 470. 



