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Cote
Titre
Date(s)
- 9 Dec. 1853 (Production)
Niveau de description
Étendue matérielle et support
7 pp
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Histoire archivistique
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Zone du contenu et de la structure
Portée et contenu
7 Camden St. and Town - Apologises for not thanking Whewell earlier for a copy of his polemic with Henry Mansel. He has been stimulated by a mathematical axiom: one of his pupils has found that he never has to use more than four colours when drawing countries which have a common boundary line. He is preparing a paper on algebra in which it is 'distinguished into 'formal' and 'material' - and this is much connected with the same view of logic'. William Hamilton claims that 'a proposition, as to logical import - nothing but an equation or non-equation between the quantities of its term - merely - and the coalescence of two terms into one notion is a consequence ('consequent upon') of the equation. To my untutored mind, it is the other way - declaration of coalescence - followed by equation of quantity for a consequence'.