CONTENTS. 



Page 

 Art. XXX. — Wave-cut Terraces in Keuka Valley, Older 



than the Recession Stage of Wisconsin Ice ; by F. 



Carney _ 325 



XXXI.— Form of Outwash Drift ; by F. Carney. 336 



XXXII. — Vapor Nucleation in the Lapse of Time ; by C. 



Barus 342 



XXXIII. — Types of Permian Insects ; by E. H. Sellards.. 345 

 XXXIV. — Origin of the Wasatch Deposits ; by F. B. Loomis 356 

 XXXV. — Method for the Estimation of Iron in presence of 



Titanium ; by F. A. Gooch and H. D. Newton 365 



XXXVI. — Esterification of Succinic Acid ; by I. K. Phelps 



and J. L. Hubbard 368 



XXXVII. — Transmission of Rontgen Rays through Metallic 



Sheets ; by J. M. Adams 375 



XXX VIII. —The Elm Creek Aerolite ; by K. S. Howard .. 379 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Oxysulphides of Zirconium and Thorium, 0. 

 Hattser : New Method of Preparing Titanium Tetrachloride, Vigouroux 

 and Arrivant, 382. — Separation and Estimation of Beryllium, Parsons 

 and Barnes : Atomic Weights of Manganese and Cobalt, Baxter and 

 Hines : Introduction to Metallurgical Chemistry, J. H. Stansbie : A Text- 

 Book of Electro-Chemistry, M. Le Blanc, 383. — Exercises in Chemistry, 

 W. McPherson and W. E. Henderson : Specific Charge and Velocity of 

 Cathode Pays excited by Rontgen Rays, A. Bestelmeyer : Wave Length 

 of Rontgen Rays, J. D. Van der Waals, Jr. : Chemical Effects of the 

 Electric Discharge in Rarified Hydrogen and Oxygen, P. J. Kirby, 384. — 

 Radio-active Matter in the Earth and the Atmosphere, G. A. Blanc, 385. 



Geology and Mineralogy — Manual of the Geology of Connecticut, W. N. Rice 

 and H. E. Gregory, 385. — Preliminary Geological Map of Connecticut, 

 H. E. Gregory and H. H. Robinson, 392. — Second Biennial Report of the 

 Commissioners of the State Geological and Natural History Survey of Con- 

 necticut : Iowa Geological Survey, Volume XVI : Limeless Ocean of Pre- 

 Cambrian Time, 393. — Samples of the Sea-floor along the Coast of East 

 Greenland, 74^-70 N. L., 0. B. Boggild : Mikroscopische Physiographie 

 der Massigen Gesteine, H. Rosenbtjsch, 394. — Henclersonville Meteorite, 

 G. P. Merrill : Reproduction Artificielle de Mineraux au xix e siecle, P. 



TCHIRTTWINSKY, 395. 



Miscellaneous Scientific Intelligence — National Academy of Sciences, 395. — 

 Commemoration of the Two Hundredth Anniversary of the birth of Lin- 

 naeus, 396. — Director United States Geological Survey : Ricerche Lagunari : 

 River Pilcomayo, Gunnar Lange, 397. — British Tunicata, Alder and 

 Hancock : Die Insektenfamilie der Phasmiden, Wattenwyl und Redten- 

 bacher : Trades and Anti-Trades : Museum of the Brooklyn Institute of 

 Art and Sciences, Charles Schaeffer, 398. — University of Illinois Bulle- 

 tin, Edward Bartow : Bulletin, No. 1, of the Carnegie Foundation for 

 the Advancement of Teaching : Dictionnaire-Manuel-Illustre de Geo- 

 graphie, A. Demangeon : Self -Propelled Vehicles, J. E. Homans, 399. — 

 Ostwald's Klassiker der Exakten Wissenschaften : Frequency Curves and 

 Correlation, W. P. Elderton, 400. 



