Xxx 
REPORT—1863. 
SECTION F.—ECONOMIC SCIENCE AND STATISTICS, 
President.—W illiam Tite, M.P., F.R.S. 
Vice-Presidents.—Christian Allhusen ; Neilson Hancock, LL.D.; James Heywood, 
E.R.S.; Sir John Ogilvy, Bart., M.P.; Colonel W. H. Sykes, M.P., F.R.S. 
Secretaries—Frederick Purdy ; Edmund Macrory; Thomas Doubleday; James 
Potts. 
SECTION G.—MECHANICAL SCIENCE. 
President.—Rev. Robert Willis, M.A., F.R.S., Jacksonian Professor of Natural and 
Experimental Philosophy in the University of Cambridge. Bi says 
Vice-Presidents.—Professor 8. Downing; J. G. Appold, F.R.S.; W. Fairbairn, 
F.R.S.; J. Hawkshaw, F.R.S.; J. Scott Russell, F.R.S.; James Nasmyth, 
F.R.S.; R. S. Newall; G. W. Rendel; Professor James Thomson, M.A.; 
Thomas Webster, F.R.S. 
Secretaries.—P, Le Neve Foster, M.A.; P. Westmacott, C.E.; J. F. Spencer. 
CORRESPONDING MEMBERS. 
Professor Agassiz, Cambridge, Massa- 
chusetts. 
M. Babinet, Paris. 
Dr. A. D. Bache, Washington. 
Dr. D. Bierens de Haan, Amsterdam. 
Professor Bolzani, Kasan. 
Dr. Barth. 
Dr. Bergsma, Utrecht. 
Mr. P. G. Bond, Cambridge, U.S. 
M. Boutigny (d’Evreux). 
Professor Braschmann, Moscow. 
Dr. Carus, Leipzig. 
Dr, Ferdinand Cohn, Breslau. 
M. Antoine d’Abbadie. 
M. De la Rive, Geneva. 
Professor Wilhelm Delffs, Heidelberg. 
Professor Dove, Berlin. 
Professor Dumas, Paris, 
Dr. J. Milne-Edwards, Paris. 
Professor Ehrenberg, Berlin. 
Dr. Eisenlohr, Car/sruhe. 
Professor Encke, Berlin. 
Dr. A. Erman, Berlin. 
Professor A. Escher yon der Linth, 
Zurich, Switzerland. 
Professor Esmark, Christiania, 
Professor A. Fayre, Geneva. 
Professor G. Firchhammer, Copenhagen. 
M. Léon Foucault, Paris. 
Professor E. Fremy, Paris. 
M. Frisiani, Milan. 
Dr. Geinitz, Dresden. 
Professor Asa Gray, Cambridge, US. 
Professor Henry, Washington, U.S, 
Dr. Hochstetter, Vienna. 
M. Jacobi, St. Petersburg. 
Prof. Jessen, Med, et Phil. Dr., Griess- 
wald, Prussia. 
Professor Aug. Kekulé, Ghent, Belgium. 
M. Khanikoff, St. Petersburg. 
Prof. A. Kolliker, Wurzburg. 
Professor De Koninck, Liége. 
Professor Keil, Vienna. 
Dr. A. Kupffer, St. Petersburg. 
Dr. Lamont, Munich. 
Prof. F, Lanza. 
M. Le Verrier, Paris. 
Baron yon Liebig, Munich. 
Professor Loomis, New York. 
Professor Gustay Magnus, Berlin. 
Professor Matteucci, Pisa. 
Professor P. Merian, Bale, Switzerland. 
Professor yon Middendorff, St, Petersburg. 
M. VAbbé Moigno, Paris. 
Professor Nilsson, Sweden. 
Dr. N. Nordenskiold, Finland. 
M. E, Peligot, Paris. 
Prof. B. Pierce, Cambridge, U.S. 
Viscenza Pisani, Florence. 
Gustav Plaar, Strasburg. 
Chevalier Plana, Turin. 
Professor Pliicker, Bonn. 
M. Constant Prévost, Paris. 
M. Quetelet, Brussels. 
Prof. Retzius, Stockholm. 
Professor W. B. Rogers, Boston, U.S. 
Professor H. Rose, Berlin. 
Herman Schlagintweit, Berlin. 
Robert Schlacintweit, Berlin. 
M. Werner Siemens, Vienna. 
Dr. Siljestrom, Stockholm. 
Professor J. A, de Souza, University of 
Coimbra. 
M. Struvé, Pulkowa. 
Dr. Svanberg, Stockholm. 
M. Pierre Tehihatchef. 
Dr. Van der Hoeven, Leyden. 
Professor E. Verdet, Paris, 
M. de Verneuil, Paris. 
Baron Sartorius yon Waltershausen, 
Gottingen. 
Professor Wartmann, Geneva. 
Dr. H. D. Buys Ballot. 
M. Des Cloizeaux. 
Professor Adolph Steen, Copenhagen. 
Dr. Otto Torell, University of Lund, 
