CONTENTS— (contin ued) . 

 February 17, 1876. 



PAGE 



I. Researches upon the Specific Volumes of Liquids. — II. By T. E. Thoepe, 

 Ph.D., F.R.S.E.jfProfessor of Chemistry in the Yorkshire College of Science, 

 Leeds 283 



II. Researches upon the Specific Volumes of Liquids. — III. By T. E. Thoepe, 

 Ph.D., P.R.S.E., Professor of Chemistry in the Yorkshire College of Science, 

 Leeds 298 



III. Experimental Contributions to the Theory of Electrolysis. By Alfred Teibe, 



Lecturer on Chemistry in Dulwich College 308 



Letter to the President from P. Cxjnlippe Owen, Director S. K. M. . . . 315 



February 24, 1876. 

 Letter to the President from T. J. Phillips Jodrell 316 



I. On determining the Depth of the Sea without the use of the Sounding-line, 

 and on an Attraction-meter. By C. William Siemens, D.C.L., E.R.S., 

 M.I.C.E. . 317 



II. On Instruments for Recording the Direction and Telocity of Currents 

 and the Temperature of the Water at different Depths in the Ocean. By 

 J. Rymer Jones, of the Imperial Government Telegraphs, Japan . . . 321 



List of Presents ........ . 330 



On the Theory of the Solution of a System of Simultaneous Non-linear 

 Partial Differential Equations of the First Order. By E. J. Nanson . . 337 



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