CONTENTS. V 



Page 



On the Action of Sulphuric Acid on Oils 153 



On Ethal 154. 



On the Action of Oxalic Acid on the Sulphates of Iron and 



Copper 1 55 



Locality of Native Mercury 156 



Donium, a new Metal contained in Davidsonite 156 



Geology of Manchester 157 



Ehrciiberg's New Discovery in Palaeontology : Tripoli com- 

 posed wholly of Infusorial Exuviae 158 



British Association for the Advancement of Science 158 



Scientific Memoirs, Part 1 159 



Meteorological Observations , 159 



NUMBER LIII.— SEPTEMBER. 



Mr. J. Ivorv on such Functions as can be expressed by Serieses 



of periodic Terms 161 



Prof J. F.W. Johnston on the |)robab!e Cause of certain Optical 

 Properties observed by Sir David Brewster in Crystals of 



Chabasie 166 



Sir David Brewster's Observations relative to the preceding 



Paper .• 170 



Mr. W. Hopkins's Reply to Dr. Boase's "Remarks on Mr. 

 Hopkins's ' Researches in Physical Geology'," in the Num- 

 ber for July , 171 



Dr. T. Andrews on the Conducting Power of certain Flames 



and of Heated Air for Electricity 176 



On a new Method of taking Deep Soundings in the Ocean . . 18.5 

 Dr. J. Apjohn on certain Statements relative to his Hj'gro- 

 metrical Researches contained in Dr. Hudson's Papers in- 

 serted in Lond. and Edinb. Phil. Mag., vol. vii. and vol. viii. . 187 

 Dr. H. Falconer and Captain P. T. Cautley on the Sivatherhim 

 giganteum, a new Fossil Ruminant Genus, from the Valley 

 of the Markanda, in the Sivalik branch of the Sub Hima- 

 layan Mountains 193 



Mr. J. Bishop's Experimental Researches into the Physiology 



of the Human Voice 201 



Mr. W. S. B. V/oolhouse's Reply to Professor Young's con- 

 cluding Remarks on the Theory of Vanishing Fractions . . 209 

 Dr. R. Hare's Examination of the Question, whether the Dis- 

 cordancy between the Charaiteristics of Mechanical Elec- 

 tricity, and the Galvanic or Voltaic Fluid, can arise from Dif- 

 ference of Intensity and Quantity; with some Observations in 

 Favour of the Exi.stence of an Electro-motive Power inde- 

 pendently of Chemical Reaction, but cooperating therewith: 

 respectively submitted to the British Association for the 



Advancement of Sciince 212 



Mr. G. Rainey on the Difference between the Attractive 

 Powers for soft Iron of the Electro-magnet and the Steel 

 Magnet ; in Reply to Dr. Ritchie 220 



