Xll CONTENTS 



Page 

 17. Design for working' the Equatorial and Dome of 'Lick' Observatory, 



California, by Hydraulic Power. By Howard Gkubb, F.R.S 553 



WEDNESDAY, SEPTEMBER 8. 



1. The Advantages to the Science of Terrestrial Magnetism to be obtained 

 from an expedition to the region within the Antarctic Circle. By Staff 

 Commander EiTPacK W. Creak, R.N., F.R.S 553 



2. On Lithanode. By Desmond G. Fitz-Gerald 553 



3. Draper Memorial Photographs of Stellar Spectra exhibiting Bright Lines. 



By Professor Edward C. Pickering 553 



4. An Apparatus for determining the Hardness of Metals. By Thomas 

 Turner, A.R.S.M 554 



5. On Star Photography. By Isaac Roberts, F.R.A.S., F.G.S 555 



6. Exhibition and Description of INIiller's portable Torsion Magnetic Meter. 



By Professor James Bltth 556 



7. On the Protection of Life and Property from Lightning. By W. 

 McGregor 556 



8. An improved Form of Clinometer. By John Hopkinson, F.L.S., F.G.S. 557 



Section B.— CHEMICAL SCIENCE. 



THURSDAY, SEPTEMBER 2. 



Addi-ess by William Crookes, F.R.S., V.P.C.S., President of the Section ... 558 



1. On the Absorption Spectra of Uranium Salts. By W. J. Russell, 



F.R.S., and W. Lapraie, F.C.S 576 



2. The Air of Dwellings and Schools, and its relation to Disease. By 

 Professor T. Carnellet, D.Sc ' 577 



3. On some probable new Elements. By Alexander Pringle 677 



4. On the Action of Bromine on the Trichloride of Phosphorus. By A. L. 

 Stern 577 



5. Dissociation and Contact-action. By the Rev. A. Irving, B.Sc, B.A. ... 577 



FRIDAY, SEPTEMBER 3. 



1. Second Report of the Committee on Vapour Pressures and Refractive 



Indices of Salt Solutions 578 



2. Second Report of the Committee on certain Physical Constants of Solu- 

 tion, especially the Expansion of Saline Solutions 578 



3. On the Phenomena and Theories of Solution. By Professor W. A. Tilden, 



F.R.S 578 



4. Water of Crystallisation. By Dr. Nicol 578 



5. On the Magnetic Rotation of Mixtures of Water, and some of the Acids 

 of the Fattv Series with Alcohol and with Svilphuric Acid, and Observa- 

 tions on Water of Crystallisation. By W. H. Perkin, Ph.D., F.R.S. ... 579 



6. On the Nature of Liquids. By William Ramsay, Ph.D., and Sydney 



Young, D.Sc 579 



7. On the JS'ature of Solution. By Professor Spencer U. Pickering 581 



