measureless: the water of a river, and the single constituents of a rock, when chemically analysed, are seen to be qualities conditioned by quantitative ratios between the matters they contain. In organic nature, however, measure again rises full into immediate perception. The various kinds of plants and animals, in the whole as well as in their parts, have a certain measure: though it is worth noticing that the more imperfect forms, those which are least removed from inorganic nature, are partly distinguished from the higher forms by the greater indefiniteness of their measure. Thus among fossils, we find some ammonites discernible only by the microscope, and others as large as a cart-wheel. The same vagueness of measure appears in several plants, which stand on a low level of organic development,--for instance, ferns. 108.] In so far as in Measure quality and quantity are only in _immediate_ unity, to that extent their difference presents itself in a manner equally immediate. Two cases are then possible. Either the specific quantum or measure is a bare quantum, and the definite being (there-and-then) is capable of an increase or a diminution, without Measure (which to that extent is a Rule) being thereby set completely aside. Or the alteration of the quantum is also an alteration of the quality. The identity between quantity and quality, which is found in Measure, is at first only implicit, and not yet explicitly realised. In other words, these two categories, which unite in Measure, each claim an independent authority. On the one hand, the quantitative features of existence may be altered, without affecting its quality. On the other hand, this increase and diminution, immaterial though it be, has its limit, by exceeding which the quality suffers change. Thus the temperature of water is, in the first place, a point of no consequence in respect of its liquidity: still with the increase or diminution of the temperature of the liquid water, there comes a point where this state of cohesion suffers a qualitative change, and the water is converted into steam or ice. A quantitative change takes place, apparently without any further significance: but there is something lurking behind, and a seemingly innocent change of quantity acts as a kind of snare, to catch hold of the quality. The antinomy of Measure which this implies was exemplified under more than one garb among the Greeks. It was asked, for example, whether a single grain makes a heap of wheat, or whether it makes a bald-tail to tear out a single hair from the horse's tail. At first, no doubt, looking at the nature of quantity as an indifferent and external character of Being, we are disposed to answer these questions in the negative. And yet, as we must admit, this indifferent increase and diminution has its limit: a point is finally reached, where a single additional grain makes a heap of wheat; and the bald-tail is produced, if we continue plucking out single hairs.