Vlll 



On the Change of Pressure and Volume produced by Chemical Combina- 

 tion. By M. Berthelot 445 



Remarks on the Determination of a Ship's Place at Sea. In a Letter to 

 Professor Stokes. By G. B. Airy, LL.D. &c, Astronomer Royal 448 



May 4, 1871. 



On the Structure and Affinities of Guynia annulata, Dune, with Remarks 

 upon the Persistence of Palaeozoic Types of Madreporaria. By P. Martin 

 Duncan, M.B. Lond., F.R.S., Professor of Geology in King's College, 

 London 450 



On the Molybdates and Vanadates of Lead, and on a new Mineral from 

 Leadhills. By Professor Dr. Albert Schrauf, of Vienna 451 



May 11, 1871. 



An Experimental Inquiry into the Constitution of Blood, and the Nutrition 

 of Muscular Tissue. By William Marcet, M.D., F.R.S., Senior Assis- 

 tant Physician to the Hospital for Consumption and Diseases of the 

 Chest, Brompton 465 



On Protoplasmic Life. By F. Crace-Calvert, F.R.S 468 



Action of Heat on Protoplasmic Life. By F. Crace-Calvert, F.R.S , 472 



List of Presents 477 



No. 129.— May 25, 1871. 



On the Temperature of the Interior of the Earth, as indicated by Observa- 

 tions made during the Construction of the Great Tunnel through £he 

 Alps. By D. T. Ansted, M.A., F.R.S., For Sec. G.S 481 



Some Remarks on the Mechanism of Respiration. By F. Le Gros Clark, 

 F.R.C.S., Professor of Anatomy and Surgery at the Royal College of Sur- 

 geons 486 



Researches on the Hydrocarbons of the Series Q n H2M+2. — VII. By C. 

 Schorlemmer 487 



Note on the Spectrum of Uranus and the Spectrum of Comet I., 1871. By 

 William Huggins, LL.D., D.C.L., V.P.R.S 488 



On a New Instrument for recording Minute Variations of Atmospheric 

 Pressure. By Wildman Whitehouse, F.M.S. &c. &c 491 



June 8, 1871. 



Election of Fellows 494 



June 15, 1871. 



On the Fossil Mammals of Australia. — Part V. Genus Nototherium, Ow. 

 By Prof. R.Owen, F.R.S 494 



On Cyclides and Sphero-Quartics. By John Casey, LL.D., M.R.I.A 495 



On a Law in Chemical Dynamics. By John Hall Gladstone, Ph.D., F.R.S., 

 and Alfred Tribe, F.C.S 498 



On the Organization of the Fossil Plants of the Coal-measures. — Part II. 

 Lepidodendra and Sigillarice. By W. C. Williamson, F.R.S., Professor of 

 Natural History in Owens College, Manchester 500 



