﻿CONTENTS. 



NUMBER CLXXXIX. 



Page. 



Akt. XVIII. — Post-Tertiary Elevation of the Sierra Nevada 



shown by the River Beds; by J. LeConte 167 



XIX.— Strain-Effect of Sudden Cooling as Exhibited by Glass 



and Steel ; by C. Barus and V. Strouhal 181 



XX. — Devonian Lamellibranchiata and Species-making ; by 



H. S. Williams 192 



XXI — Composition of Certain " Pliocene Sandstones" from 



Montana and Idaho; by G. P. Merrill 199 



XXII. — Contributions to Mineralogy (with Crystallographic 



Notes by Des Cloizeaux) ; by W. E. Hidden 204 



XXIII. — Turquois from New Mexico; by F. W. Clarke 



and J. S. Diller 211 



XXV. — Electrical Resistance of Soft Carbon under Pressure; 



by T. C. Mendenhall _ 218 



XXVI. — Comparison of Maps of the Ultra Violet Spectrum ; 



by E. C. Pickering 223 



XXVII. — Two hitherto undescribed Meteoric Stones ; by 



E. S. Dana and S. L. Penfield 226 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics. — Density Pipette, A mat: "Water of Crystallization, Pick- 

 ering-, 231.— Fulminating Silver of Berthollet, Raschig, 232. — Formation of 

 Anhydrite or Anhydrous Calcium Sulphate, G. Spezia. 233. 



Geology and Mineralogy. — Volcanoes of Japan, J. Milne, 233. — Summit Crater of 

 Mt. Loa, Mokuaweoweo, Alexander, 235. — Kilauea, Hawaii: Map of Maui, of 

 the Hawaian Islands : Taconic stratigraphy and fossils, J. D. Dana, 236. — 

 Tertiary Ophiolitic and basic rocks of Scotland and Ireland, B. Lotti, 239. — 

 Onus probandi left for others, 240. — Preliminary Report upon Petroleum and 

 inflammable Gas of Ohio, E. Orton : Clay-beds on the west bank of the Hudson, 

 241. — Fossil Flora of the Laramie Series of Western Canada, W. Dawson, 

 242. — Decay of Building Stones, T. Kglestox: Geological Studies, A. Winchell, 

 243. — Glacial action in Australia : Analysis of Biotite, E. Claassen, 244. 



Botany. — Lloyd's Drugs and Medicines of North America : Cypripedium arieti- 

 num: Index to the Botanical Gazette, 244. — The Cayuga Flora, W. K. Dudley: 

 Catalogue of the Plants in the Herbarium of the College of Science, Tokyo, 

 Japan, 245. 



Miscellaneous Scientific Intelligence. — The Races of Britain, J. Beddoc, 245. — Estu- 

 dios de Meterologia Comparada, M. Barcena y M. P^rez: Monument to 

 Horace-Benedict de Saussure : Biographies of American Naturalists, III, J. B. 

 Marcou : La Terre des Merveilles, J. Leclercq, 246. 



Obituary. — Dr. Hermann Abich, 246. 



