362 



INDEX 



Dirichlet, Lejeune, 42. 

 Dissection Problems, 54, 256-260. 

 Dissection, Proofs by, 52-54, 256-260. 

 Dodecahedron Game, 189-192. 

 Dodgson, C. L. on Parallels, 45. 

 Dominoes, 22-23, 168-169. 

 Dominoes, Arranqements of, 178-181. 

 Doubly-Magic Squares, 156-157. 

 Drayton, 184. 

 Dudeney, H. E. 26, 33, 47, 72, 119, 



160, 194, 203, 259. 

 Duplication op Cube, 338-344. 

 Durer, A. 138. 

 Dynamical Games, 69-80. 



Earnshaw, S. 108. 



Eckenstein, O. on Kirkman's Problem, 



193, 199, 203, 209, 217, 220, 222. 

 Eight Queens Problem, 113-118. 

 Eisenlohr, A. on Annies, 350. 

 Eisenstein, F. G. 40. 

 Ellis, E. Leslie, 166. 

 Elusive Loop, String Trick, 332. 

 Encke, J. F. 277. 

 Enestrom, G. on ir, 349. 

 Epicurus on Gravitation, 171. 

 Equilibrium, Puzzles on, 90-93. 

 Eratosthenes, 340. 

 Escott, E. B. 160, 305. 

 Etten, van, 11. 

 Euclid, 38, 44-45, 297. 

 Euc. i. 32, 52. 

 Euc. i. 47, 52, 256, 257. 

 Euler, L. 38-41, 61, 122-127/150, 158, 



335, 356. 

 Eulerian Squares, 159. 

 Euler's Officers Problem, 158. 

 Euler's Unjcursal Prob., 179-182. 

 Euzet, M. 258. 

 Exploration Problems, 23. 



Fabre, J. H. 164. 

 Fairfax, 316. 



"Fallacies, Arithmetical, 28-31 

 ^ — Geometrical, 44-52. 

 "^-Mechanical, 84-87, 93-98. 

 Fermat, P. 36-43. 

 Fermat on Binary Powers, 39-40. 

 Fermat's last theorem, 40-43. 

 Ferry-boat Problems, 71-73. 

 Fifteen Girls Problem, chap. x. 

 Fifteen Puzzle, 224-228. 

 Firth, W. 143. 

 Fitzpatrick, J. 75. 

 Five Disc Problem, 253-255. 

 Fluid Motion, 101-107. 

 Fly, String Figure, 332-333. 

 Fly-on-the-Nose, String Trick, 334-335. 

 Fonteney on Ferry Problem, 72. 

 Force, Definition of, 87. 



Fortunatianus, 54. 



Fouquieres, Becq de, on Games, 63. 



Four-Colour Map Theorem, 54-59. 



Four "4's" Problem, 14. 



Four " 4's," Analogous Problems, 14. 



Four Digits Problem, 13. 



Fourrey, E. 253. 



Fox, Captain on w, 359. 



Frankenstein, G. 148. 



FnSnicle (de Bessy), B. 144. 



Frost, A. H. 150, 194. 



Fuller, T. 268. 



Galton, F. 28. 



Games, Dynamical, 69-80. 



— Statical, 62-69. 



— with Counters, 74-80. 

 Gauss, C. F. 43, 269, 277. 

 Geodesic Problems, 73-74. 

 Geography, Physical, 59-61. 

 Geometrical Fallacies, 44-52. 



— Problems, Three Classical, chap, 

 xvi. 



— Becreations, chaps, in. rv. xi. xn. 

 Gerbert, 298. 



Gergonne's Problem, 240-244. 



Germain, S. 42. 



Gerwien, P. 258. 



Gill, T. H. on Kirkman's Prob., 194. 



Glaisher, J. W. L. 114, 163, 349. 



Glamorgan, Earl of, 317. 



Goldbach's Theorem, 39. 



Golf-balls, Flight of, 105. 



Great Northern Puzzle, 69, 82. 



Greenwich, Labyrinth at, 186. 



Gregory, Jas. 347, 355. 



Gregory of St Vincent, 343. 



Gregory's Series, 356. 



Grienberger on tt, 356. 



Grille, The, 297. 



Gronfeld's Method in Ciphers, 306. 



Gros, L. on Chinese Eings, 232, 234. 



Guarini's Problems, 135-136. 



Guitel, E. 258. 



Gun, Beport of, 108. 



Giinther, S. 113, 139. 



Guthrie on Colouring Maps, 55. 



Haan, B. de on ir, 349, 354. 

 Haddon, K. 332. 

 Halley on ir, 356. 

 Halter, String Trick, 333. 

 Hamilton, Sir Wm. 189-192. 

 Hamiltonian Game, 189-192. 

 Hampton Court, Maze at, 182, 186. 

 Handcuff, String Figure, 335. 

 Hanoi, Tower of, 228-229. 

 Harison, G. D. L. 194, 218. 

 Harrison, C. H. 320. 

 Harzer, P. on ir, 352. 



