vi 



January 24, 1884. 



rage 



Observations on the Influence of certain Culture Fluids and Medicinal 

 Reagents in the Growth and Development of the Bacillus tuberculosis. 

 By C. Theodore Williams, M.A., M.D., F.R.C.P., Physician to the 

 Hospital for Consumption, Brompton 222 



The effects of Lesions of Different Regions of the Cerebral Hemispheres. 

 By David Ferrier, M.D., LL.D., F.R.S., and Gerald F. Yeo, M.D., 

 F.B.C.S 222 



January 31, 1884. 



Determination of the Vertical and Lateral Pressures of Granular Sub- 

 stances. By Isaac Roberts, F.G.S., F.R.A.S 225 



Notes on the Microscopic Structure of some Rocks from the Andes of 

 Ecuador, coUected by E. Whymper, F.R.G.S. No. I. Pichincha. By 

 Professor T. G. Bonney, D.Sc, F.R.S 241 



Report on the Tidal Disturbances caused by the Volcanic Eruptions at 

 Java, August 27 and 28, 1883, and the Propagations of the " Super- 

 tidal " Waves. By Major A. Baird, R.E 248 



List of Presents 253 



On a New Standard of Illumination and the Measurement of Light. By 

 William Henry Preece, F.R.S 270 



February 7, 1884. 



On the Motion of Fluid, part of which is moving Rotationally and part 

 Irrotationally. By M. J. M. Hill, M.A., Professor of Mathematics at 

 the Mason Science College, Birmingham 276 



Supplementary Note on the Constitution of Chlorophyll. By Edward 

 Schunck, F.R.S 285 



No. 230. — February 14, 1884. 



On a New Reflecting Galvanometer of Great Sensibility, and on New 

 Forms of Astatic Galvanometers. By Thomas Gray, B.Sc, F.R.S. E., 

 and Andrew Gray, M.A., F.R.S.E 287 



A New Form of Spring for Electric and other Measuring Instruments. 

 By Professors W. E. Ayrton, F.R.S., and John Perry, M.E 297 



Note on the Theory of the Magnetic Balance of Hughes. By Professor 

 Silvanus P. Thompson, B.A., D.Sc, Univ. Coll., Bristol 319 



February 21, 1884. 



On some relations of Chemical Corrosion to Voltaic Current. By G. 

 Gore, F.R.S., LL.D 331 



On an Explanation of Hall's Phenomenon. By Shelford Bidwell, M.A., 

 LL.B 341 



