CONTENTS TO YOLUME XXX. 



Numlber 175. 



Page 

 Art. I. — Platinum-Rhodium Thermoelement from 0° to 1755° ; 



by R. B. SosMAN 1 



II. — Remarkable Twins of Atacamite and on some other 

 Copper Minerals from Collahurasi, Tarapaca, Chili ; by 

 W. E. Ford. 16 



III.— Crustal Warping in the Temagami-Temiskaming Dis- 

 trict, Ontario ; by L. V. Pirsson 25 



IV. — Jurassic Age of the " Jurassic Flora of Oregon " ; by 



F. H. Knowlton 33 



V. — Geologic Bearing of the Peat Beds of Anticosti Island ; 



by W. H. TWENHOFEL - - 65 



VI. — Hydrolysis of Esters of Halogen Substituted Acids ; 



by W. A. Drxjshel and J. W. Hill 72 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Quantitative Reagent for Iron and Copper, Biltz 

 and HoDTKE : Detection and Determination of Very Minute Quantities of 

 Silver, 6. S. Whitby, 79. — Beryllium Formates, S. Tantae : Recalcula- 

 tion of the Atomic Weights, F. W. Clarke, 80. — Pressure of Light on 

 Gases, P. Lebedew : Coherers, W. H. Eccles : Measurement of High 

 Pressure, 81. — Radiochemistry, A. T. Cameeon: Acht Vorlesungungentiber 

 Theoretische Physik, M. Planck, 82. — National Physical Laboratory, 83. 



Geology and Mineralogy — United States Geological Survey, G. 0. Smith, 

 83. — Illinois Geological Survey, 84. — Northern Territory of South Aus- 

 tralia, H. Y. L. Beown, 85. — Corrasion by Gravity Streams with Applica- 

 tions of the Ice Flood Hypothesis, E. C. Andeews, 86. — Antike Tierwelt, 

 O. Kellee : Orders of Mammals, W. K. Geegort : Analyse der Silikat- 

 und Karbonatgesteine, W. F. Hillebrand, 88. — Manual of the Chemical 

 Analysis of Rocks, H. S. Washington : Handbuch der Mineralogie, C. 

 HiNTZE : Crystallography ; An Elementary Manual for the Laboratory, M. 

 B. Wadswoeth, 89. — Brief Notices of some recently described Minerals, 

 90. — Cristallisatious des Grottes de Belgique, W. Prinz, 91. — Mineralogie 

 de la France et de ses Colonies, A. Lacroix, 92. 



Natural History — Fungous Diseases of Plants, B. M. Duggae, 92. —British 

 Freshwater Rhizopoda and Heliozoa : Guide to the Genera and Classifica- 

 tion of the North American Orthoptera, S. H. Scuddee : Nature Study by 

 Grades, H. H. Cummings : The Body and its Defences, F. G. Jewett : A 

 Synonymic Catalogue of Orthoptera, W. F. Kirbt, 98. — Catalogue of 

 British Hymenoptera of the Family Chalcididae, C. Moeley : Catalogue 

 of the Noctuidse in the British Museum, G. F. Hampson : Museum of 

 the Brooklyn Institute of Arts and Sciences, 94. 



Miscellaneous Scientific Intelligence — Carnegie Foundation for the Advance- 

 ment of Teaching, 94. — Carnegie Institution of Washington : Publications 

 of the Allegheny Observatory of the University of Pittsburgh, 95. 



Obituary — William Phipps Blake, 95 : Geoege Frederic Barker : 

 Franklin C. Robinson : August von Mickwitz : Robert H. Gordon. 



