1XX REPORT — 1879. 



That Mr. John Perry (Secretary), Professor Unwin, Professor James 

 Thomson, and Mr. W. E. Ayrton be a Committee for the purpose of 

 investigating the Laws of Water Friction ; and that the sum of 201. be 

 placed at their disposal for the purpose. 



That the Committee, consisting of Mr. W. E. Ayrton (Secretary), Dr. 

 0. J. Lodge, Mr. J. E. H. Gordon, and Mr. J. Perry, for the purpose of 

 accurately measuring the specific inductive capacity of a good Sprengel 

 Vacuum, and the specific resistance of gases at different pressures, be re- 

 appointed ; and that the sum of 201. be placed at their disposal for the 

 purpose. 



That the Committee, consisting of the Rev. Dr. Haughton and Mr. B. 

 Williamson, for the calculation of Tables of Sun-heat Coefficients, be 

 reappointed ; that Mr. B. Williamson be the Secretary, and that the sum 

 of 501. be placed at their disposal for the completion of the work. 



That the Committee, consisting of Professor G. Forbes (Secretary), 

 Professor W. G. Adams, and Mr. W. E. Ayrton, be reappointed for the- 

 purpose of improving an instrument for detecting the presence of Fire-damp 

 in Mines ; and that the sum of 10Z. be placed at their disposal for the 

 purpose. 



That Mr. J. M. Thomson (Secretary), and Mr. J. E. H. Gordon be 

 appointed a Committee to continue Researches on the Specific Inductive- 

 Capacity of certain Crystals and Paraffines ; and that the sum of 251. be 

 placed at their disposal for the purchase and preparation of materials. 



That Professor Dewar, Dr. Williamson, Dr. Marshall Watts, Captain 

 Abney, Mr. G. J. Stoney, Mr. W. N. Hartley, Professor McLeod, Pro- 

 fessor Carey Foster, Mr. A. K. Huntington, Professor Emerson Reynolds, 

 Professor Remold, Professor Liveing, and Mr. W. Chandler Roberts be a 

 Committee for the purpose of reporting upon the present state of our 

 knowledge of Spectrum Analysis ; that Mr. W. Chandler Roberts be the- 

 Secretary, and that the sum of 101. be placed at their disposal for the 

 purpose. 



That Dr. Wallace, Professor Dittmar, and Mr. Pattinson be a Com- 

 mittee for the purpose of reporting on the best means for the development 

 of Light from Coal-gas of different qualities ; that Dr. Wallace be the 

 Secretary, and that the sum of 10Z. be placed at their disposal for the 

 purpose. 



That Professor P. M. Duncan and Mr. G. R. Vine be a Committee for 

 the purpose of reporting on the Carboniferous Polyzoa ; that Mr. Vine be 

 the Secretary, and that the sum of 101. be placed at their disposal for the 

 purpose. 



That Professor A. Leith Adams, the Rev. Professor Haughton, Professor 

 W. Boyd Dawkins, and Dr. J. Evans, be a Committee for the purpose of 

 exploring the Caves of the South of Ireland ; that Professor A. Leith 

 Adams be the Secretary, and that the sum of 101. be placed at their dis- 

 posal for the purpose. 



That Professor H. G. Seeley, Professor W. Boyd Dawkins, and Mr. C. 

 Moore be a Committee for the purpose of reporting upon the viviparous 

 nature of the Ichthyosauria ; that Professor Seeley be the Secretary, and 

 that the sum of 101. be placed at their disposal for the purpose. 



That Mr. John Evans, Sir John Lubbock, Bart., Mr. Edward Vivian, 

 Mr. George Busk, Professor W. Boyd Dawkins, Mr. William Ayshford 

 Sanford, Mr. John Edward Lee, and Mr. William Pengelly be a Com- 

 mittee for the purpose of finishing the Exploration of Kent's Cavern 



