INDEX, 



Abstraction, 95. 



Academy, French, 112. 



Addition, 76 ; associative law of, 10 ; 



commutative law of, 9. 

 Ahmes, 122. 



Alchwarizmi.Muhammed Ibn Musa, 131. 

 Algebraic curves, theory of, 35. 

 Alhaitam, Ibn, 131. 

 Analytical geometry, 67. 

 Anaxagoras, 123. 

 Antiphon, 125. 

 Apollonius, 27, 34. 



Approximation, constructions of, 137. 

 Arabs, magic squares of, 42 ; squaring 



of the circle among, 128 et seq. 

 Archimedes, 27, 113, 117, 126 et seq. 

 Arithmetic, 36 ; pure, 8 et seq. ; monism 



in, 8-26. 

 Aryabhatta, 129. 

 Association, laws of, 18. 

 Associative law of addition, 10. 

 Augend, 10. 



Axioms, Euclid's, 79 et seq. 

 Aztecs, 5, 73. 



Babylonians, squaring of the circle 



among, 122 et seq. 

 Bacteriology, 36. 

 Basselin, 136. 

 Beman, W. W., 143. 

 Bhaskara, 129. 

 Bible, speaks of four dimensions, 106 ; 



squaring of the circle in the, 123. 

 Bischoff, Professor, 136. 

 Bohm, 137. 

 Bolyai, 37, 79. 



Bovillius, 132. 

 Brahmagupta, 130. 

 Brouncker, Lord, 138. 

 Bryson, 125. 



Cagliostro, 102. 



Calculus, Differential, 29. 



Cardan, 13. 



Cards, problem at, 51 et seq. 



Chemistry, 37; application of the idea of 

 multi-dimensioned space to theoret- 

 ical, 88. 



Chess-knight, magic squares that in- 

 volve the move of the, 57 et seq. 



Chinese, 130; squaring of the circle 

 among, 128 et seq. 



Christian nations, squaring of the circle 

 among, 128 et seq. 



Cipher, 13. 



Circle-squarers, 113 et seq. 



Circumversion, congruence by, 81. 



Clairvoyance, 103. 



Clavius, 133. 



Clebsch, Alfred, 35. 



Clerget, 136. 



Clocks, 4. 



Commutation, 15-18. 



Commutative law of addition. 9. 



Complex numbers, 24, 35. 



Concentric magic squares, 55 et seq. 



Configurations, 88. 



Congruent figures, 80. 



Conic sections, 34. 



Construction, problems of, 118. 



Continuous functions, 28. 



Copernicus, 94. 



