CONTENTS. 



Page 

 I. On the Composition of the Ohio and Canadian Sulphur 



Petroleums. By Charles F. Mabery 1 



II. On the Occlusion of Baric Chloride by Baric Sulphate. By 

 Theodore William Richards and Harry George 

 Parker 67 



III. On the C upriammonium Double Salts. Third Paper. By 



Theodore William Richards and George Oenslager 78 



IV. ' On the Cuprianiline Acetobromides. By Theodore William 



Richards and Frederic Charles Moulton ... 87 



"V. The Chemical Potential of the Metals. By Wilder D. 



Bancroft 96 



VI. On the Behavior of Certain Derivatives of Benzol containing 



Halogens. By C. Loring Jackson and Sidney Calvert 123 



VII. Bromine Derivatives of Metaphenylene Diamine. By C. Loring 



Jackson and Sidney Calvert 136 



VIII. A Revision of the Atomic Weight of Zinc. First Paper: The 

 Analysis of Zincic Bromide. By Theodore William 

 Richards and Elliot Folger Rogers 158 



IX. Note on the Automorphic Linear Transformation of a Bilinear 



Form. By Henry Taber 181 



X. Thermo-electric Interpolation Formulce. By Silas W. Holman 193 



XI. Melting Points of A luminum, Silver, Gold, Copper, and Platinum. 



By S. W. Holman, with R. R. Lawrence and L. Barr 218 



