CONTENTS. xi 



TRANSACTIONS OF THE SECTIONS. 



Section A.— MATHEMATICAL AND PHYSICAL SCIENCE. 



THURSDAY, SEPTEMBER 11. 



Page 

 Address by Professor John Puksek, MA., LL.D., M.R.IA., President of the 

 Section'. 499 



L *0n the Question as to the Accurate Conservation of Weight in Chemical 

 Reactions. By Lord Ratleigh, F.R.S 511 



2. *Motion of a Detached Thread of Liquid in a Capillary Tube. By Pro- 



fessor W. B. Morton, M.A., and W. Hawthorn 511 



3. *0n the Vibrations of a Plucked String. By Professor W. B. Morton, 



M.A., and T. B. Vintcomb 511 



4. *0n Continuous Motion produced by Vibrations. By Professor W. B. 



Morton, M.A., and A. M. Kinsky ". 511 



5. *0n the Prevention of a Deposit of Dew on the Lenses of a Projecting 

 Lantern. By Professor A. Schuster, F.R.S 511 



6. Further Experiments by the Thermal Method on the Variation of the 

 Critical Velocity of Water witb Temperature. By Howard T. Barnes, 

 M.A.Sc, D.Sc 512 



FRIDAY, SEPTEMBER 12. 

 Department II. — Astronomy and Cosmical Physics. 



Address by Professor A. Schuster, Ph.D., F.R.S., Chairman 512 



•Discussion on the NeDula surrounding Nova Persei, opened by A. R. Hinks 

 with an Exhibition of some I'hotographs from the Yerkes and Lick 

 Observatories 521 



1. New Solar Radiation Recorder. By Dr. W. E. Wilson, F.R.S 521 



2. Search for ultra-Neptunian Planet. By Dr. W. E. Wilson, F.R.S 521 



3. Minimum Sim-spots and Terrestrial Magnetism. By the Rev. A. L. 

 CoRTiE, S.J., F.R.A.S ■. 622 



MONDA.Y, SEPTEMBER 15. 

 Department I. — Mathematics. 



1. Report on the Present State of the Theory of Pomt Groups (p. 81) 523 



2. On the Partial Differential Equations of Mathematical Physics. By 



E. T. Whittaker, M.A 523 



