ILLUSTRATIONS 



The First Membership Ticket . . . Frontispiece 

 Sir David Brewster, F.R.S. . . . Facing p. 16 

 Eev. William Vernon Harcourt, F.R.S. . 17 



Signatures (reduced) from a collection made at the 



Cambridge Meeting, 1833 31 



Professor John Phillips, F.R.S. . . . Facing p. 32 

 Sir Roderick I. Murchison, Bart., F.R.S. . 33 



Rt. Hon. Professor T. H. Huxley, P.O., F.R.S. 64 



Professor John Tyndall, F.R.S. . ,,65 



Rev. Professor Adam Sedgwick, F.R.S. . 80 



Rev. Professor William Whewell, F.R.S. . 81 



Diagram illustrating the years of foundations of Corre- 

 sponding Societies ...... 95 



Presidential Banners . . . Facing pp. 112, 113 

 Rt. Hon. Lord Kelvin, O.M., F.R.S. . . Facing p. 160 

 Kew Observatory . . . . . 161 



Sir William Crookes, K.C.B., F.R.S. . . 240 



Rt. Hon. Lord Rayleigh, P.C., O.M., F.R.S. 241 



The portraits of Brewster, Whewell, Huxley, and Tyndall are from 

 photographs, that of Sedgwick from an engraving, and that of Rayleigh 

 from an engraving from the portrait by Sir George Reid, in the possession 

 of the Royal Society, the Council of which lent them for reproduction. 

 The portraits of Phillips and Murchison were lent by the Council of the 

 Geological Society. The portrait of Harcourt is from a print lent by 

 Dr. W. E. Collinge. The view of Kew Observatory was lent by Dr. Charles 

 Chree, and is reproduced by permission of Mr. E. H. Nichols, who took the 

 photograph. The portraits of Kelvin and Crookes are from photographs 

 by Messrs. Maull & Fox and Mr. Thomas Fall respectively. 



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