vi 



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On a pure Fermentation of Mannite and Glycerin. By Percy F. 

 Frankland, Ph.D., B.Sc. (Lond.), Assoc. Boy. Sch. of Mines, Pro- 

 fessor of Chemistry in University College, Dundee, and J oseph J. Fox 345 



On the Effect of Temperature on the Specific Inductive Capacity of a 

 Dielectric. By W. Cassie, M.A 357 



On the Interchange of the Variables in certain Linear Differential 

 Operators. By E. B. Elliott, M.A., Fellow of Queen's College, Oxford 358 



On the Bate of Decomposition of Chlorine- water by Light. By G. Gore, 

 LL.D., F.K.S 362 



Barium Sulphate as a Cement in Sandstone. By Frank Clowes, D.Sc, 

 Principal and Professor of Chemistry and Metallurgy in University 

 College, Nottingham 363 



Deposits of Barium Sulphate from Mine- water. By Frank Clowes, 

 D.Sc, Principal and Professor of Chemistry and Metallurgy in 

 University College, Nottingham 368 



Protoplasmic Movements and their Relation to Oxygen Pressure. By 

 James Clark 370 



Note on the Development of Yoltaic Electricity by Atmospheric Oxida- 

 tion of combustible Gases and other Substances. By C. R. Alder 

 Wright, D.Sc, F.R.S., Lecturer on Chemistry and Physics, and C. 

 Thompson, F.I C, F.C.S., Demonstrator of Chemistry in St. Mary's 



Hospital Medical School 372 



On certain Geometrical Theorems. No. 4. By W. H. L. Russell, A.B., 

 F.R.S 376 



An Experimental Verification of the Sine Law of Malus. By E. J. Spitta 376 



Observations on the Spark Discharge. By J. Joly 376 



List of Presents 376 



No. 284.— November 21, 1889. 



Nomination of Officers and Council 384 



Further Discussion of the Sun-spot Observations made at South 

 Kensington. A Report to the Solar Physics Committee. By J. 

 Norman Lockyer, F.R.S 385 



On the Cause of Variability in Condensing Swarms of Meteorites. By 

 J. Norman Lockyer, F.R.S 401 



On the Local Paralysis of Peripheral Ganglia, and on the connexion of 

 different Classes" of Nerve Fibres with them. By J. N. Langley, 

 F.R.S., Fellow of Trinity College, and W. Lee Dickinson, M.R.C.P., 

 Caius College, Cambridge 423 



On the Tubercles on the Roots of Leguminous Plants, with special refer- 

 ence to the Pea and the Bean. By H. Marshall Ward, M.A., F.R.S., 

 F.L.S., late Fellow of Christ's College, Cambridge, Professor of 

 Botany in the Forestry School, Royal Indian Engineering College, 

 Cooper's Hill 431 



List of Presents 443 



