CONTENTS. 



Page 

 I. On the Thermal Conductivities of certain Poor Conductors. — I. 



By B. 0. Peirce and R. W. Willson 1 



II. The Contact-Potential between Metals and Fused Salts, and the 

 Dissociation of Fused Salts. By Clarence McCheyne 

 Gordon 57 



III. On Fluctuations in the Composition of Natural Gas. By Francis 



C. Phillips 69 



IV. Some Electrochemical and Thermochemical Relations of Zinc and 



Cadmium Amalgams. By Theodore William Richards 

 and Gilbert Newton Lewis 85 



V. Trinitrophenyhnalonic Ester. Second Paper. By C. Loring 



Jackson and J. I. Piiinney 101 



VI. On the Action of Sodic Ethylate on Trihromdinitrobenzol. By C. 



Loring Jackson and Waldemar Koch 117 



VII. On Certain Derivatives of Symmetrical Trichlorbenzol. By C. Lor- 

 ing Jackson and F. II. Gazzolo 137 



VIII. Shoreline Topography. By F. P. Gulliver 149 



IX. Japanese Collembola. By Justus Watson Folsom .... 259 



X. Tlie Use of the Transition Temperatures of Complex Systems as 

 Fixed Points in Thermometry. By Theodore William 

 Richards and Jesse Briggs Churchill 275 



XI. On the Thermal Conductivity of Cast Iron. By E. H. Hall and 



C. H. Ayres 281 



