CONTENTS. 



Page 

 Art. XL. — The Binary System MgO-SiO s ; by N. L. Bowen 



and Olaf Andersen I : 



XLI. — Application of the Displacement. Interferometer to 



the Horizontal Pendulum ; by C. Baeus 501 



XLTI. — Hydrolysis of Esters of Substituted Aliphatic Acids ; 



by W. A. Detjsb el 514 



XLIIL— Thermochemistry - and the Periodic Law. Heats of 

 Combination ; Linear Functions of the Atomic Weights 

 of Related Elements ; by W. G. Mixteb 519 



XLIY. — Picking Out and Mounting Diatoms ; by J. M. 



Bl ake ----. - - 535 



XLV. — Chemical Composition of Bornite and its Relation to 

 Other Sulpho-Minerals ; by E. H. Keaus and J. P. 



GOLDSBEERY 539 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics. — Relative Abundance of Several Metallic Elements. 

 F. W. Clarke and G. Steiger, 553. — Spitting of Silver, H. B. Baker : 

 Laboratory Guide to the Study of Qualitative Analysis, E. H. S. Bailey 

 and H. P. Cady, 554. — Chemistry in America, E. F. Smith : Annual 

 Reports of the Progress of Chemistry for 1918, 555. — Progress of Scientific 

 Chemistry in Our Own Times, W. A. Tilden : Synthetic Use of Metals in 

 Organic Chemistry, J. Hale : Electrical Analogue of the Zeeman Effect, J. 

 Stark, 556. — Secondary Standards of Wave-Length in the Infra-Red. A. 

 Ignatieff : Electrical Conductivity and Ionization Constants of Organic 

 Compounds, H. Scudder, 558. — Theory of Heat Radiation, M. Planck, 559. 



Geology — Virginia Geological Survey, 559. — Florida State Geological Survey: 

 Illinois Geological Survey: Ohio and Mississippi Floods of 1912. H. C. 

 Frankenfield : New Zealand Geological Survey, 560. — Mountains; 

 their Origin, Growth, and Decay, J. Geikie, 561. — La Geographic de 

 Terre-Neuve. R. Perret : Fossilium Catalogus : Spitsbergen Map of Prince 

 Charles Foreland from Surveys, W. S. Bruce, J. Mathison, etc., 562. 



Miscellaneous Scientific Intelligence — National Academy of Sciences. 562.— 

 Carnegie Foundation for the Advancement of Teaching ; Eighth Annual 

 Report of the President, Henry S. Pritchett, 563. —Carnegie Foundation 

 for the Advancement of Teaching; Education in Vermont. 564.— Mining 

 World Index of Current Literature, G. E. Sisley : LesPrix Nobel en 1912 ; 

 Manual of Bacteriology, H. S. Reed, 565. 



Obituary— N. H. Winchell : C. S. S. Peirce : E. Suess ; J. Huber : R. K. 

 Gray, 566. 



Index to Volume XXXVII, 567. 



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