CONTENTS. XI 



Page 



4. On the Boiling Points and Vapour Tension of Mercury, of Sulphur, and 



of some Compounds of Carbon, determined by means of the Hydi-ogeu 

 Thermometer. By Professor J. M. Crafts 487 



5. On the Occurrence of Tellurium and Selenium in Japan. By Professor 

 Edward Diveks, JNI.D., and Masachika Shimose 487 



FRIDA Y, A UG UST 25. 



1. Report of the Committee appointed to investigate by means of Photo- 



graphy the Ultra-Violet Spark Spectra emitted by jMetallic Elements, 

 and their combinations under varying conditions 489 



■2. Report of the Committee appointed to prepare a new series of Tables of 

 Wave-Lengths of the Spectra of the Elements 489 



3. On the Application of the Diamond to Mineralogical and Chemical Ana- 

 lysis. By Professor YOif Batjmhatjer 489 



4. On the Action of the Component Salts as Nuclei on Supersaturated Solu- 



tions of certain Compound Salts. By John M. Thomson, E.C.S 490 



5. On the Decomposition by Heat of Chlorate of Potassium. By Albert 

 RiLLiET and Professor J. M. Crafts 493 



6. Hydrocarbons of the Formula (C JIs"),,. By Professor W. A. Tilden, 

 F.R.S 494 



7. On the Activity of Oxygen, and the Mode of Formation of Hydrogen 

 Dioxide. By C. T. Kingzett, F.I.C., F.C.S 494 



8. Metallic Compounds containing Bivalent Hydrocarbon Radicals. Part 



HI. By Professor Saktjrai, F.C.S 495 



3I0NDAY, AUGUST 22,. 

 • 1. Report of the Committee on the Calibration of Mercmdal Thermometers 495 



2. Third Report of the Committee upon the present state of our Knowledge 



of Spectrum Analysis 49o 



3. On the Reversals of the Spectral Lines of Metals. By Professor Liveing, 

 F.R.S., and Professor Dewae, F.R.S 495 



4. On the Electric Furnace. By Dr. C. AV. Siemens, F.R.S., and Professor 



A. K. Huntington 496 



5. The Aerorthometer, an Instrument for correcting the Measure of a Gas. 



By A. Vernon Haecourt, M.A., F.R.S 499 



6. A Revision of the Atomic Weight of Rubidium. By Charxes T. Hex- 



cock, B.A 499 



7. On a Method of oliitaining Ammonia from Shoddy and Allied Substances. 



By W. Marriott, F.C.S WO 



Section C— GEOLOGY. 

 THURSDAY, AUGUST 21. 



Address by Robert Etheridge, F.R.S.L. and E., F.G.S., President of the 



Section 50- 



1. Notes relating to some of the Drift Phenomena of Hampshire: 1. 

 Boulders, Havling Island ; 2. Chert Debris in the Hampshire Gravel ; 

 Elephant BedJ Freshwater Gate. By Professor Peestwich, M. A., F.R.S., 

 F.G.S 529 



