Ivi REPORT — 1872. 



aud Mr. SudJcr be reappointed a Committee for tlie purpose of taking obser- 

 vations on the effect of tlie denudation of timber on the rainfall of North 

 Britain ; that Mr. Hutchinson be the Secretary, and that the sum of .£20 be 

 placed at their disposal for the purpose, the grant made last year not having 

 been drawn. 



That the Committee for the purpose of continuing the investigations on 

 the Treatment and Utilization of Sewage be renewed, and that such Com- 

 mittee consist of Mr, 11. B. Grantham, Professor Corfield, Mr. J. Bailey 

 Denton, Mr. Bramwell, Dr. J. H. Gilbert, Mr. W. Hope, Dr. A. Voeleker, 

 Professor "Williamson, and Professor AVay, aud that the sum of £100 be 

 placed at their disposal for the purpose. 



That the Committee, consisting of Mr. Froude, Professor "W. J. Macquorn 

 Eankine, Mr. C. W. Merrifield, Mr. C. W. Siemens, Mr. Bramwell, Mr. A. E. 

 Fletcher, the Rev J. Berthon, Mr. Shoolbred, Mr. James R. Napier, and Mr. 

 W. Smith previonsl}' appointed for measuring the speed of ships by means of 

 the difference of the height of two columns of liquid, be requested to report 

 generally on the subject of instruments for testing the speed of shij^s, and that 

 they be requested to present a separate report on the special class of instru- 

 ments therein referred to them ; that the sum of <£50 be placed at their dis- 

 posal for the purpose, aud that Mi\ J. Shoolbred bo the Secretary. 



Ajjj^lications for Reports and Researches not involving Grants of Moneij. 



That the Committee, consisting of Dr. Joule, Sir W. Thomson, Professor 

 Tait, Professor Balfour Stewart, and Professor J. C. Maxwell, be reappointed 

 to effect the determination of the Mechanical Equivalent of Heat. 



That the Eclipse Committee, consisting of the President and General Offi- 

 cers (with power to add to their number), be reappointed. 



That Sir W. Thomson, Professor Everett, Professor G. C. Poster, Professor 

 J. C. Maxwell, Mr. G. J. Stoney, Professor Eleeming Jcnkin, Professor Ran- 

 kine, Dr. Siemens, and Mr. Bramwell be a Committee for reporting on the 

 Nomenclature of Dynamical and Electrical Units, and that Professor Everett 

 be the Secrctarj". 



That Professor Sylvester, Professor Cayley, Professor Hirst, Rev. Professor 

 Bartholomew Price, Professor H. J. S. Smith, Dr. Spottiswoode, Mr. R. B. 

 Hayward, Dr. Salmon, Rev. R. Townsend, Professor EuUer, Professor Kel- 

 land, Mr. J. M. "Wilson, and Professor Clifford be reappointed a Committee 

 (with power to add to their number) for the purpose of considering the pos- 

 sibility of improving the methods of instruction in elementary geometry ; and 

 that Professor Clifford be the Secretary. 



That Mr. "W. H. L. Russell be requested to continue his Report on recent 

 progress in the theory of Elliptic and Hyperelliptic Functions. 



That Professor Tait be requested to prepare a Report on Quaternions. 



That the Committee, consisting of the following Members, with power to 

 add to their number, — Professor Roscoe, Professor "W. G. Adams, Professor 

 Andrews, Professor Balfour, Mr. Baxendell, Mr. Bramwell, Professor A. Crum 

 Brown, Mr. Buchan, Dr. Carpenter, Professor Core, Dr. De La Rue, Professor 

 Thiselton Dyer, Sir SValter Elliot, Professor M. Foster, Professor Flower, Pro- 

 fessor G. C. Foster, Professor Geikie, Dr. J. H. Gladstone, Mr. Griffith, Rev. 

 R. Harley, Dr. Hirst, Dr. Hooker, Dr. Huggins, Professor Huxley, Professor 

 Fleeming Jeukin, Dr. Joule, Colonel Lane Fox, Dr. Lankestcr, Mr. J. N, 

 Lockyer, Professor Clerk Maxwell, Mr. D. Milne-Home, Dr. O'Callaghan, 

 Dr. Odling, Professor Ramsay, Dr. Spottiswoode, Professor Balfour Stewart, 



