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With this brief indication of the mechanical principles which have directed the evolution of two of the most remarkable groups of the one-celled animals we must be content, or the dimensions of this volume will not enable us even to reach the higher and more interesting types. We must advance at once to the larger animals, whose bodies are composed of myriads of cells.

There are many types, and the explanations of others have not proved so easy. The Harvard College photographs have disclosed the very great prevalence of variability, and this is certainly one of the lines in which modern discovery must progress. Roberts, in South Africa, has done splendid work on the periods of variables of the Algol type. New Stars.

On this conventional principle it reaches a limited excellence of its own, in which the best existing types of engraving are executed, and ultimately, the most regular expressions of organic form in painting.

In the domestic races of cattle, both of the humped and humpless types, the horns are short and thick in the bull, longer and more slender in the cow and ox; and in the Indian buffalo, they are shorter and thicker in the bull, longer and more slender in the cow.

And on carrying out the comparison in detail, we find that these major analogies involve many minor analogies, far closer than might have been expected. Others might be added. We had hoped to say something respecting the different types of social organization, and something also on social metamorphoses; but we have reached our assigned limits.

Nor is the essence of the quantitative method changed when the answer is to be found, not in one, but in several 'unknown quantities. Take, for instance, the question as to the best types of elementary school to be provided in London. If it were assumed that only one type of school was to be provided, the problem would be stated in the same form as that of the size of the Debating Hall.

Another group method, which has been adopted as a means of introducing children to books and of securing continuity of interest, is that of the reading club. The three articles given show the influence of the direct, personal effort of Miss Hewins, and the carefully organized work of somewhat different types in two large library systems.

Two married partners, between or in whom this love subsists, are an image and form of it: all likewise in the heavens, where faces are the genuine types of the affections of every one's love, are likenesses of it; for, as was shewn above, it pervades them in the whole and in every part.

There are other aims, reaching on into the far, slow modes of psychological growth, which must equally determine the choice of the story-teller's material and inform the spirit of her work. These other, less immediately attainable ends, I wish now to consider in relation to the different types of story by which they are severally best served. First, unbidden claimant of attention, comes

However, no such progress from more to less generalized types has been demonstrated, although many trained investigators have searched the fossiliferous rocks for such evidence of evolution.