CONTENTS. 



VII. Memoir on the Rotation of Crops, and on the Quantity/ of Inorganic Mutters 



abstracted from the Soil hy various Plants under dijferent circumstances. 

 By Charles Daubeny, M.D., F.R.S., ^c, Honorary Member of the Royal 

 English Agricultural Society, and Professor of Rural Ecmomy in the University 

 of Oxford page 179 



VIII. An Account of the Artificial Formation of a Fegeto- Alkali. By George Fownes, 



Ph.D., F.R.S., Chemical Lecturer in the Middlesejc Hospital Medical School, 

 Communicated hy Thomas Graham, Esq., F.R.S., S^c 253 



IX. On Benzoline, a new Organic Salt-base from Bitter Almond Oil. By George 



Fownes, ^sq., Ph.D., F.R.S 2G3 



X. On the Elliptic Polarization of Light by Reflexion from Metallic Surfaces. 



By the Rev. Baden Powell, M.A., F.R.S., F.G.S., F.R.A.S., SavilianProfessor 

 of Geometry in the University of Oxford 269 



XI. Electro-Physiological Researches.— First Memoir. The Muscular Current. By 



Signor Carlo Matteucci, Professor in the University of Pisa, S^c. 8^c. Commu- 

 nicated by Michael Faraday, Esq., F.R.S., S^c. S^c 283 



XII. Electro-Physiological Researches. — Second Memoir. On the proper Current of the 



Frog. By Signor Carlo Matteucci, Professor in the University of Pisa, 8^c. 8^c. 

 Communicated by Michael Faraday, Esq., F.R.S., Sfc. ^c 297 



XIII. ElectrO'Physiological Researches. — Third Memoir. On Induced Contractions. 

 By Signor Carlo Matteucci, Professor in the University of Pisa, 8fc. S^c. 

 Communicated by W. Bowman, Esq., F.R.S 303 



XIV. On the Temperature of Man. By John Davy, M.D., F.R.S.L. ^ E., Inspector- 



General of Army Hospitals 319 



XV. Contributions to the Chemistry of the Urine. On the Variations in the Alkaline 



and Earthy Phosphates in the Healthy State, and on the Alkalescence of the 

 Urine from Fixed Alkalies. By Henry Bence Jones, M.A., Cantab., Fellow 

 of the College of Physicians. Communicated by S. Hunter Christie, Esq., 

 Sec.R.S. 335 



