CONTENTS. Xiii 



TUESDAY, SEPTEMBER 16. 



Depaetment I. — Physics. 



Page 



1. Animal Thermostat. By Lord Kelvin 543 



2. On the Application of the Method of Eotropy to Radiant Energy By 



J. Laejior, D.Sc, Sec.R.S 546 



•3. On the Relation of Voltaic Potential Differences to Temperature, By 

 J. Labjioe, D.Sc, Sec.R.S 546 



4. *Does Motion through the Ether cause Double Refraction P By Lord 



Ratleigh, F.R.S '. 546 



5. Report on Electrical Standards (p. 53) 546 



6. Magnetic Detectors in Space Telegraphy. By Professor Eenest Wilson 547 



7. A new Receiver for Hertzian Oscillations. By Professor G. M. Minchin, 



F.R.S 547 



8. A Graphical Method of Determining the Discharge Curve of a Condenser 

 through a variable Self-induction. By E. W. Marchant, D.Sc .548 



9. On Luminosity and the Kinetic Theory. By J. Btttler Bueke, M.A.... 549 



10. The Physical Aspects of a Theory of Colour Vision. By F. W. 



Edeidge-Geeen, M.D., F.R.C.S ". 549 



11. Light Aluminium Tubes. By F. H. Nalder 551 



Department II. — Asteonomy and Cosmical Physics. 



1. *Exhibition of Celestial Photographs from the Yerkes Observatory. By 



A. R. HiNKS, M.A 551 



2. Possible Changes on the Lunar Surface. By S. A. Saundee, M.A 551 



.3. The Relative Apparent Motions of Bright and Faint Stars. By Professor 

 H. H. TuENEE, F.R.S 552 



4. A Standard Scale for Telescopic Observations. By Peecival Lowell... 553 



5. Expedition for ascertaining the best Location of Observatories. By 

 Peecival Lowell 554 



6. Spectrograms of Jupiter, Uranus, and Vesta. By Peecival Lowell ... 555 



7. The LTncertainty of our present Knowledge of the Distance of the Sun. 



By A. R. HiNKs, M.A 555 



8. *The Positions of Hydrogen and Helium in Relation to the Earth's Atmo- 

 sphere. By Professor G. H. Bryan, F.R.S 556 



Section B. — CHEMISTRY. 

 THURSDAY, SEPTEMBER 11. 



Address by Professor Edward Divers, M.D., F.R.S., V.P.C.S., President of 



the Section 557 



]. *0n the Corrosion of Copper by Sea-water, and on the Detection of 

 Traces of Impurity in the Commercial Metal. By Professor E. A. Letts, 

 Ph.D 576 



