[50] Spencer says (F. P., pp. 169-70) that 'the transformation of the unorganised contents of an egg into the organised chick is a question of heat' ['altogether a question of heat', in the Third Edition], and tells us that 'the germination of plants presents like relations of cause and effect as every season shows'. But he also says that 'the proclivities of the molecules determine the typical structure assumed'. Obviously here the 'heat supplied' falls under (3) of the text, and 'the proclivities of the molecules' is his notion of what should fall under (2). [51] See Index to F. P., _sub verbo_ 'integration'. [52] e. g. 'Diminish the velocities of the planets and their orbits will lessen--the solar system will contract, or become more integrated.' _Essays_, vol. iii, p. 28. Mere condensation is often spoken of as integration. But then the term is used with bewildering laxity. Cf. James, _Memories and Studies_, p. 134. [53] I retain in this connexion the current term physico-chemical. It seems that the basal type of relatedness here is electrical. It may be said that when we come down to the atom the _things in_ relation are electrical, are electrons, are positive and negative charges. So be it. But is it not the _electrical relatedness_ that is constitutive of the atom as such? [54] 'A large number of physical properties', says Nernst, 'have been shown to be clearly additive; that is, the value of the property in question can be calculated as though the compound were such a mixture of its elements that they experience no change in their properties.' But other properties are not additive. 'The kind of influence of the atom in a compound is primarily dependent on the mode of its union, that is, upon the constitution and configuration of the compound. Such non-additive properties may be called constitutive.' Quoted by E. G. Spaulding in _The New Realism_, p. 238. [55] _System of Logic_, vol. i, Bk. III, ch. vi. [56] _Problems of Life and Mind_, Series II, p. 212. [57] Of course if a particular physico-chemical change (_a_) is correlated with a particular physiological or vital change (_b_), then (_b_) implies (_a_) as (_a_) implies (_b_). The statement in the text refers to the implications of classes of change. There may be physico-chemical relatedness without any correlated vital relatedness; but there does not appear to be any vital relatedness which is not correlated with physico-chemical relatedness. [58] _Essays_, vol. iii, pp. 31, 55. [59] Ps., vol. ii, p. 484. [60] F. P., p. 178. [61] An ordinal correlation is one that couples every term of a series (_a_) with a specific term of another series (_b_) and _vice versa_ in the same order in each. Cf. Spaulding in _The New Realism_, p. 175. I shall sometimes speak of such correlation as serial. [62] _Principles of Biology_, Edition of 1898, pp. 117, 120. [63] _Op. cit._, p. 122. [64] Ps., vol. i, p. 208. [65] F. P., p. 61. Cf. Ps., vol. i, p. 134.