CONTENTS. 
I. Chemical and Physiological Experiments on living Cinchonae. By J. Broughton, B.Sc., 
F.C.S., Chemist to the Cinchona-Plantations of the Madras Government. Commu- 
nicated by Dr. E. Frankland, F.R.S. page 1 
II. A Ninth Memoir on Qualities. By Professor Cayley, F.R.S. ...... 17 
III. On Supersaturated Saline Solutions. — Part II. By Charles Tomlinson, F.R.S. 51 
IV. Magnetic Observations made at Stony hurst College Observatory , from April 18G3 to 
March 1870. By the Rev. S. J. Perry. Communicated by the President. . 69 
V. On the Theory of Resonance. By the Hon. J. W. Strutt, M.A., Fellow of Trinity 
College , Cambridge. Communicated by W. Spottiswoode, F.R.S. ... 77 
VI. On the Formation of some of the Subaxial Arches in Man. By George W. 
Callender, Assistant-Surgeon to and Lecturer on Anatomy at St. Bartholomew' s 
Hospital. Communicated by J. Paget, F.R.S . 119 
VII. Polarization of Metallic Surfaces in Aqueous Solutions. On a new Method of 
obtaining Electricity from Mechanical Force , and certain relations between Elec- 
trostatic Induction and the Decomposition of Water. By Cromwell Fleetwood 
Varley. Communicated by Sir W. Thomson, F.R.S 129 
VIII. On the Structure and Development of the Skull of the Common Frog (Rana tempo- 
raria, L.). By William Kitchen Parker, F.R.S. 137 
IX. On the Fossil Mammals of Australia . — Part IV. Dentition and Mandible of Thy- 
lacoleo carnifex, with remarks on the arguments for its Herbivority. By Professor 
Owen, F.R.S. &c 213 
