OF ARTS AND SCIENCES. 631 



James Ford Rhodes, of Boston, was elected a Resident Fel- 

 low in Class III., Section 3 (Political Economy and History). 



On the motion of A. G. Webster, it was 



Voted, That the date of reception be placed at the head of 

 papers received for publication, instead of or in addition to the 

 date of presentation, so that papers may be printed, if necessary, 

 without waiting for presentation at a meeting. 



Arthur G. Webster exhibited and described Maxwell's 

 Dynamic Top. 



The following papers were read by title : — 



On Certain Derivatives of Symmetrical Trichlorbenzol. By 

 C. Loring Jackson and F. H. Gazzolo. 



On the Action of Sodic Ethylate on Tribromdinitrobenzol. By 

 C. Loring Jackson and Waldemar Koch. 



Trinitrophenylmalonic Ester, Second Paper. By C. Loring 

 Jackson and J. L Phinney, 



A Revision of the Atomic Weight of Nickel, Second Paper. 

 The Determination of the Nickel in Nickelous Bromide. By 

 Theodore Wm. Richards and Allerton S. Cushman. 



A Revision of the Atomic Weight of Cobalt, Second Paper. 

 The Determination of the Cobalt in Cobaltous Bromide. By 

 Theodore Wm. Richards and Gregory P. Baxter. 



The Contact-potential between Metals and Fused Salts, and 

 the Dissociation of Fused Salts. By Clarence McC. Gordon. 

 Presented by Theodore Wm. Richards. 



Some Electrochemical and Thermochemical Relations of Zinc 

 and Cadmium Amalgams. By Theodore Wm. Richards and 

 Gilbert N. Lewis. 



On the Thermal Conductivity of Cast Iron. By Edwin H. 

 Hall and C. H. Ayres. 



On Fluctuations in the Composition of Natural Gas. By 

 Francis C. Phillips. Presented by the C. M. Warren Com- 

 mittee. 



Shoreline Topography. By F. P. Gulliver. Presented by W. 

 M. Davis. 



