CONTENTS. XI 



. FRIDAY, AUGUST 16, 1878. 



Page 



1. Notes on Aluminium Alcohols. By Dr. Gladstone and Alfred Tribe... 508 



2. On the Estimation of Mineral Oil or Paraffin Wax when mixed with 



other Oils or Fats. By Willtam Thomson, F.K.S.E 508 



3. On the ActioD of Heat on the Selenate of Ammonium. By Dr. Ed- 

 mund W. Davy, Professor of Forensic Medicine, Royal College of 

 Surgeons, Ireland 509 



4. A New Method of Alkalimetry. By Louis Siebold, F.O.S 509 



MONDAY, AUGUST 19, 1878. 



1. Notes on Water from the Severn Tunnel Springs. By William Lant 



Carpenter, B.A., B.Sc, F.C.S 511 



2. On the Thetines. By E. A. Letts, Professor of Chemistry, University 



College, Bristol 511 



3. On the Spectrum of Chlorochromic Acid. By G. Johnstone Stonev and 

 Professor J. Emerson Reynolds 511 



4. Summary of Investigations on the Pyridine Series. By Dr. W. Ramsay 511 



5. On some of the Derivatives of Furfural. By Dr. W. Ramsay 512 



6. Nitric Acid ; its Reproduction from the lower Oxides of Nitrogen. By 

 Bernard 0. Molloy 512 



7. On some Substances obtained from the Root of the Strawberry. Bv Dr. 



T. L. Phipson, F.C.S 514 



8. On a new Mineral White Pigment. By Dr. T. L. Phipson, F.C.S 514 



TUESDAY, AUGUST 20, 1878. 



1. On a Simplification of Graphic Formulae. By Oliver J. Lodge, D.Sc. ... 516 



2. On the Detection by means of the Microphone of Sounds which accom- 

 pany the Diffusion of Gases through a thin Septum. By W. Chandler 

 Roberts, F.R.S 517 



3. A short Account of Baeyer's Synthesis of Indigo. By Professor J. Emer- 

 son Reynolds, M.A., F.C.S 517 



4. Dr. Ramsay exhibited Victor Meyer's Apparatus for taking Vapour Den- 

 sities of Substances with High Boiling Points 517 



5. On the Condensation of the Gases hitherto called Permanent. Hy Pro- 

 fessor James Dewar, F.R.S 517 



6. On a Method of Elementary Organic Analysis by a Moist Process. By 

 Professor Wanklyn and W. J. Cooper 517 



7. On some Peculiarities of the Vartry Water, and on the Action of that 



Water upon Boiler Plates. By Charles R. O. Tichborne, LL.D., Ph.D., 

 F.C.S 517 



8. On a New Process of Photo-Chemical Printing in Metallic Platinum. By 



W. Willis, jun 518 



Section C— GEOLOGY. 



THURSDAY, AUGUST 15, 1878. 



Address by Mr. John Evans, D.C.L., F.R.S., F.S.A., F.G.S., President of 



the Section 519 



