CONTEXTS. Xlii 



Page 



5. *0n a new Electromagnet and an Echelon Spectroscope for INIagneto-optic 

 Observations. By Professor A. Gray, F.R.S., and Dr. W. Stewaet ... 5G9 



6. On Resolving' Power in the Microscope and Telescope, By Professor 



J, D. Eyereit, F.R.S 569 



7. On the Interference of Light from Independent Sources, By G, John- 



stone Stoney, M.A., D.Sc, F.R.S .- 570 



8. A Long Period Solar Variation. By William J. S, Lockyek 570 



Department II. — Meteobology, 



1. Report on Meteorological Observations on Ben Nevis (p. 54) 577 



2. The Seismograph as a Sensitive Barometer, By F. Napier Denisox ... 577 



3. *0n Meteorological Phenomena in Relation to Changes in the Vertical. 



By Professor J. Milne, F.R.S 578 



WEDNESDAY, SEPTEMBER 18. 



1. Report on the Determination of Magnetic Force on Board Ship (p. 29)... 578 



2. On a New Form of Instrument for Observing the Magnetic Dip and In- 

 tensity on Board Ship at Sea. By Captain E. W. Creak, C.B., F.R.S. 



(p. 29) 579 



3. *Noto on some Results obtained with the Self-recording Instruments for 



the Antarctic Expedition. By Dr. R. T. Glazebrook, F.R.S 579 



4. On a Determination by a Thermal Method of the Variation of the Critical 



Velocity of Water with Temperature. By H. T. Barnes, M.A.Sc, D.Sc , 

 and E. G. Cokee, M,A., D.Sc 579 



5. The Interference and Polarisation of Electric Waves. By Professor 



G. Quincke (p. 39) 581 



6. On the Effects of Magnetisation on the Electrical Conductivity of Iron 

 and Nickel. By Guy Barlow, B.Sc 581 



7. *The Influence of a Magnetic Field on the Viscosity of Magnetisable 

 Liquids. By Professor A. Gray, F.R.S -582 



8. ■'The Influence of a Magnetic Field on the Viscosity of Magnetisable 

 Solids. By Professor A, Gray, F.R.S 582 



9. Magnetisation of Electrolytic Nickel. By James W, Peck and Robert 



A. HousTOUN 582 



10. A New Form of Permeameter. By Professor F. G, Baily, M, A 582 



11. Note on the Coherer. By Professor James Blyth, M.A., LL.D 583 



Section B. — CHEMISTRY. 

 THURSDAY, SEPTEMBER 12. 



Address by Professor Percy F. Frankl.and, Ph.D., F.R.S., President of the 



Section 584 



1. Duty-free Alcohol for Chemical Research. By W. T. Laavrence 597 



2. The Coal Tar Industry. By Dr. A. G. Green (p. 252) 600 



3. Report on a New Series of Wave-length Tables of the Spectra of the 



Elements (p, 79) 6C0 



