VI • CONTENTS. 



Number 196. 



Page 



Art. XXVI. — Discovery of Pre-Historic Human Remains 

 near Cuzco, Peru ; by H. Bingham, Director of the Yale 

 Peruvian Expedition. (With Plates I and II) 297 



XXVII. — Geologic Relations of the Cuzco Remains; by 



I. Bowman. „ 306 



XXVIII. — Report on the Remains of Man and of Lower 

 Animals from the Vicinity of Cuzco, Peru ; by G. F. 

 Eaton , 325 



XXIX. — Estimation of Lead, Nickel, and Zinc by Precipita- 

 tion as Oxalates and Titration with Potassium Perman- 

 ganate ; by H. L. Ward . _ 334 



XXX. — Description of the Skulls of Diadectes lentus and 

 Animasaurus carinatus ; by E. C. Case and 8. W. Wil- 

 liston 339 



XXXI. — New Volumetric Method for the Determination of 



Mercury ; by G. S. Jamieson 349 



XXXII. — Volumetric Method for the Determination of 



Hydrazine ; by G. S. Jamieson 352 



XXXIII. — Relations of the Degree of Metamorphism to Geo- 

 logical Structure and to Acid Igneous Intrusion in the 

 Narragansett Basin, Rhode Island ; by F. H. Lahee 354 



Chemistry and Physics— Separation of Titanium from Niobium, Tantalum, 

 Thorium, and Zirconium, J. H. Muller : Cementite, Ruff and Gersten, 

 373. — Use of Sulphur Monochloride for Decomposing Certain Minerals, 

 W. B. Hicks : Determination of Water, Zerewitinoff, 374. — Reduction 

 of Vanadic Acid in Concentrated Sulphuric Acid Solution, Cain and 

 Hostetter : Die Zersetzung von Stickstoffdioxyd im elektrischen Glimm- 

 strom, J. Zenneck, 375. — Mechanism of the Semi-permeable Membrane, 

 and a New Method of Determining Osmotic Pressure, F. T. Trouton, 

 377. — Note on the Monatomicity of Neon, Krypton and Xenon, Sir W. 

 Ramsay, 378. — Modern Microscopy, M. I. Cross and M. J. Cole : Labo- 

 ratory Problems in Physics, F. T. Jones and R. R. Tatnall, 379. — 

 Storage Batteries, H. W. Morse : A Laboratory Manual of Physics and 

 Applied Electricity, 380. — Die Bearbeitung des Glases auf dem Blase- 

 tische, D. Djakonow and W. Lermantoff, 381. 



Geology — West Virginia Geological Survey : Wirt, Roane, and Calhoun 

 Counties, R. V. Hennen, 381. — Geological Survey of New Jersey : State 

 of the Ice in the Arctic Seas : Wisconsin Geological and Natural His- 

 tory Survey, 382. — Annual Progress Report of the Geological Survey of 

 West Australia for the year 1910 : Uses of Peat, C. A. Davis, 383. 



Miscellaneous Scientific Intelligence — Carnegie Institution of Washington 

 Year Book No. 10, 1911 : Publications of the Carnegie Institution, 384. — 

 Elements of the Differential and Integral Calculus, W. A. Granville : 

 Theory and Practice of Technical Writing, S. C. Earle : Publications 

 of the Harvard College Observatory : Publications of the Allegheny 

 Observatory of the University of Pittsburgh, 386. 



Obituary— C. E. Dittton. 387 : T. H. Montgomery, Jr. : J. B. Smith : R, S. 

 Tarr, 388. 



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