CONTENTS 
XX. On the Barometrical Variation as affected by the Moons Declination. By Luke 
Howard, Esq., F.R.S page 441 
XXL Contributions to the Chemistry of the Urine. Part II . — On the Variations in 
the Alkaline and Earthy Phosphates in Disease. By Henry Bence Jones, 
M.A., Fellow of the Royal College of Physicians. Communicated by Thomas 
Graham, Esq., F.R.S. , fyc . 449 
XXII. Remarks on the Extractive Material of Urine, and on the Excretion of Sulphur 
and Phosphorus by the Kidneys, in an unoxidized state. By Edmund Ronalds, 
Ph.D., Giessen. Communicated by Golding Bird, A.M., M.D., F.R.S., 8fc. 461 
XXIII. On the Fossil Remains of the soft parts of For aminij era, discovered in the Chalk 
and Flint of the South-east of England. By Gideon Algernon Mantell, Esq., 
LL.D., F.R.S., 8$c 465 
XXIV. On the Secretory Apparatus of the Liver. By C. Handfield Jones, M.D. 
Communicated by Sir Benjamin C. Brodie, Bart 473 
XXV. Electro-Physiological Researches. — Fourth Memoir. The Physiological Action 
of the Electric Current. By Signor Carlo Matteucci, Professor in the Uni- 
versity of Pisa, 8fc. 8$c. Communicated by Michael Faraday, Esq., F.R.S., 
fyc. fyc 483 
XXVI. On the Mechanism of Respiration. By Francis Sibson, Esq. Communicated 
by Thomas Bell, Esq., F.R.S., 8fc 501 
XXVII. On the Physiology of the Human Voice. By John Bishop, Esq., F.R.S. 551 
XXVII I. On the Motion of Gases. By Thomas Graham, Esq., F.R.S., Professor of 
Chemistry in University College, London ; Hon. Fellow of the Royal Society of 
Edinburgh ; Corresponding Member of the Royal Academies of Sciences of 
Berlin and Munich, of the National Institute of Washington, fyc. . . . 573 
XXIX. On the Supra-renal, Thymus and Thyroid Bodies. By John Goodsir, Esq. 
Communicated by Richard Owen, Esq., F.R.S., 8$c 633 
Index 643 
Appendix. 
Presents f 1 ] 
