CONTENTS. 



I. THE COMPRESSIBILITY OF LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, AND 



CJESIUM. BY T. W. RICHARDS, W. N. STULL, AND F. BONNET, JR. 



Compression Apparatus 9 



Standard of Pressure 12 



Description of Materials 15 



Preliminary Experiments 17 



Final Determinations 18 



Data and Results 20 



Summary 25 



II. THE COMPRESSIBILITY OF CARBON, SILICON, PHOSPHORUS, SULPHUR, AND 

 SELENIUM. BY T. W. RICHARDS, W. N. STULL, AND F. N. BRINK. 



Preparation of Material 29 



The Apparatus 31 



Determinations of Compressibilitiy 34 



Calculation of the Results 36 



Data concerning the Compressibility of Five Non-Metals 37 



Discussion of the Results 37 



Summary 40 



III. THE LINEAR COMPRESSIBILITY OF COPPER AND IRON, AND THE CUBIC 

 COMPRESSIBILITY OF MERCURY. BY T. W. RICHARDS AND F. N. BRINK. 



Determination of Differences between Compressibility of Iron and Copper 



and Mercury 44 



Apparatus for Determining the Linear Compressibility of Copper and Iron . . 45 



Data concerning the Compressibility of Iron 50 



Data concerning the Compressibility of Copper 50 



The Absolute Compressibility of Mercury 51 



Summary 52 



IV. THE COMPRESSIBILITIES OF THE MORE IMPORTANT SOLID ELEMENTS, AND 

 THEIR PERIODIC RELATIONS. BY T. W. RICHARDS AND W. N. STULL. 



Preparation of Materials 56 



The Apparatus 58 



Calculation of Results 59 



Data concerning Compressibilities of 21 Metals 61 



Comparison of Results 63 



Compressibilities, Atomic Weights, and Atomic Volumes 65 



Summary 67 



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