Xli CONTENTS 



Page 



7. On Geometry of Four Dimensions. By Edwaed T. Dixon 618 



8. A Suggestion from the Bologna Academy of Science towards an agree- 



ment on the Initial Meridian for the Universal Hour. By Dr. Cffis. 

 ToNDiNi DE Qtjakenghi 618 



Section B.— CHEMICAL SCIENCE. 



THURSDAY, SEPTEMBER 6. 



Address by Professor W. A. Tilden, D.Sc, F.R.S., F.C.S., President of the 



Section 620 



1. Report of the Committee for the investigation of the action of Light on 



the Hydracids of Halogens in presence of Oxygen 627 



2. Second Report of the Committee on the Bibliography of Solution 627 



3. Second Report of the Committee for investigatiug the Nature of Solution 627 



4. Second Report of the Committee for investigating the Influence of Silicon 



on the properties of Steel 627 



5. On the Study of Mineralogy. By T. Stkrrt Hunt, LL.D., F.R.S 627 



6. On the Logarithmic Law and its connection with the Atomic Weights. 



By Dr. G. Johnstone Stoney, F.R.S 630 



7. On Dissociation. By the Rev. A. Irving, D.Sc, B.A 630 



8. On Closed-chain Formula. By J. E. Marsh, B.A 631 



9. On Van't Hotf's Hypothesis and the Constitution of Benzene. By J. E. 



Marsh, B.A 631 



FRIDAY, SEPTEMBER 7. 



1. Discussion on the Chemical Problems presented by Living Bodies, opened 



by Professor Michael Foster, Sec.R.S 631 



2. On the Atomic Weight of Oxygen. By Alexander Scott, M.A., D.Sc, 

 F.R.S.E 631 



3. The Incompleteness of Combustion in Explosions. By Professor H. B. 



Dixon, F.R.S., and H. W. Smith, B.Sc 632 



4. A new Gas Analysis Apparatus. By W. W. J. Niool, M.A., D.Sc 632 



5. The Determination of Vapour-densities at High Temperatures and under 

 Reduced Pressure. By Dr. William Bott, F.C.S 632 



6. On Photographing Hydrogen and Chlorine Bulbs by aid of the Flash of 

 Light which caused their Explosion. By Prolessor P. Phillips Bedson, 

 D.Sc : ; 633 



7. On the Formation of Crystals of Calcium Oxide and Magnesium Oxide in 



the Oxyhydrogen Flame By J. Jolt, M.A., B.E 634 



SATURDAY, SEPTEMBER 8. 



1. Report of the Committee on the present methods of teaching Chemistry... 634 



2. Chemistry as a School Subject. By the Rev. A. Irving, D.Sc, B.A. ... 634 



MONDAY, SEPTEMBER 10. 



1. Discussion on Valency, opened by Professor H. E. Armstrong, F.R.S. ... 635 



2, Evidence of the Tetravalency of Oxygen derived from the Constitution of 



the Azonaphthol-Compounds. By Professor R. Meldola, F.R.S., F.C.S., 

 ^•I-t' 635 



