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actions activity adaptation aggregate alterations amounts animals appears arise arrangement atoms become body called cause cells certain changes chemical colloids combination common comparatively complex compounds conclusion consider considerable constituting contained continuous contrasts correspondence creatures definite differentiation direct displayed distinct divergence effects elements environment equilibrium evidence evolution exhibit exist external extreme facts follows forces forms functions further germ give given going greater groups grow growth heat Hence heterogeneity higher hypothesis implies incident increase individuals kind leaves less limit living lower manifest marked mass matter means mobility modes modifications molecular motion moving natural needful organisms original parent passing phenomena plants possess present produced races reason relations respect result separate shown similarly special creations species structure substances successive throughout tion tissues truth types units unlike variations various vital whole
Strana 255 - is a definite combination of heterogeneous changes, both simultaneous and successive, in correspondence with external coexistences and sequences.
Strana 17 - Although chemically inert in the ordinary sense, colloids possess a compensating activity of their own, arising out of their physical properties. While the rigidity of the crystalline structure shuts out external impressions, the softness of the gelatinous colloid partakes of fluidity, and enables the colloid to become a medium for liquid diffusion, like water itself.
Strana 167 - It is a corollary from that primordial truth which, as we have seen, underlies all other truths, that whatever amount of power an organism expends in any shape is the correlate and equivalent of a power that was taken into it from without.
Strana 396 - ... existence of those animal species that actually exemplify it. To what natural laws or secondary causes the orderly succession and progression of such organic phenomena may have been committed, we, as yet, are ignorant.
Strana 17 - The inquiry suggests itself whether the colloid molecule may not be constituted by the grouping together of a number of smaller crystalloid molecules, and whether the basis of colloidality may not really be this composite character of the molecule.
Strana 53 - Life is a series of definite and successive changes, both of structure and composition, which take place within an individual without destroying its identity.
Strana 57 - ... state. An inorganic body cannot be oxidized, without being at the same time changed in weight, colour, atomic arrangement, temperature, and electric condition. And in some...
Strana 239 - Kentucky, are blind. In some of the crabs the foot-stalk for the eye remains, though the eye is gone ; — the stand for the telescope is there, though the telescope with its glasses has been lost. As it is difficult to imagine that eyes, though useless, could be in any way injurious to animals living in darkness, their loss may be attributed to disuse.