vii 



Page 



Summary of an Experimental Inquiry into the Function of Bespiration 

 at Various Altitudes. By William Marcet, M.D., F.E.S 293 



On Stresses in Earefied Gases arising from Inequalities of Temperature. 

 By J. Clerk Maxwell, F.B.S., Professor of Experimental Physics in the 

 University of Cambridge 304 



Note on the Existence of Carbon in the Coronal Atmosphere of the Sun. 

 By J. N. Lockyer, F.E.S 308 



On the Physiological Action of the Poisonous Principle of Urechites 

 Suberecta. By James John Bowrey, F.C.S., M.I. C. Analytical Chemist 

 to the Government of Jamaica 309 



May 2, 1878. 



On the Life-History of a Minute Septic Organism : with an account of 

 Experiments made to determine its Thermal Death Point. By the 

 Eev. W. H. Dallinger. (Plates 8-9) 332 



On the Eeversal of the Lines of Metallic Yapours. By G. D. Liveing, 

 M.A., Professor of Chemistry, and J. Dewar, M.A., F.E.S., Jacksonian 

 Professor, University of Cambridge 350 



Preliminary Note on Experiments in Electro-Photometry. By James 

 Dewar, F.E.S., Jacksonian Professor, University of Cambridge 354 



On the Determination of the Scale Value of a Thomson's Quadrant Elec- 

 trometer used for Eegistering the Variations in Atmospheric Electricity 

 at the Kew Observatory. By G. M. Whipple, B.Sc, Superintendent 

 of the Kew Observatory 356 



May 9, 1878. 



On the Action of Sonorous Vibrations in varying the Force of an Electric 

 Current. By Professor D. E. Hughes 362 



Note on the Minute Anatomy of the Thymus. By Herbert Watney, 

 M.A., M.D., Cantab 369 



On the Classification of Loci. By W. K. Clifford, F.E.S., Professor of 

 Applied Mathematics in University College, London 370 



Harmonic Analyzer. Shown and explained by Sir William Thomson, 

 F.E.S., Professor of Natural Philosophy in the University of Glasgow.. 371 



May 16, 1878. 



Experimental Eesearches on the Electric Discharge with the Chloride of 

 Silver Battery. Part II. The Discharge in Exhausted Tubes. By 

 Warren De La Eue, M.A., D.C.L., F.E.S., and Hugo W. Muller, 

 Ph.D., F.E.S 374 



Note on Legendre's Coefficients. By I. Todhunter, F.E.S 381 



On the Spectra of Metalloids. Spectrum of Oxygen. By Arthur Schuster, 

 Ph.D., F.E.A.S , 383 



