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While it usually attacks only one foot, it is not uncommon for the other foot to be affected after an interval, and in some cases it is bilateral from the outset. It must clearly be understood that any form of gangrene may occur in old persons, the term senile being here restricted to that variety which results from arterio-sclerosis.
It is not improbable that, could we arrive at the causes conditioning all the complex inter-relations between the several parts of one animal, we should at the same time obtain the key to unlock the secrets of specific origination. The facts to be considered are the phenomena of "homology," and especially of serial, bilateral, and vertical homology.
A cut across an animal of this class will show us better the bilateral arrangement of the parts. In such a section we see the edge of the two shells on either side; within these the edge of the mantle; then the double rows of gills; and in the middle the alimentary canal, the heart, and the blood-vessels branching right and left.
But, while doubtless considerably modified, it has still retained many characteristics almost certainly possessed by our primitive bilateral ancestor. The different parts of hydra were arranged like those of most flowers, around one main vertical axis; it was thus radiate in structure, having neither front nor rear, right nor left side.
Often, following azoturia, a bilateral affection is to be observed. Treatment. Horses may be restrained in the standing position, and in the average instance, a twitch and hood are all the restraining appliances necessary. In cases where the disease is unilateral and atrophy is not of too long standing, recovery is possible in vigorous subjects.
Normalization of U.S. relations with China has facilitated China's full entry into the international community and encouraged a constructive Chinese role in the Asia-Pacific region. Our relations with China have been rapidly consolidated over the past year through the conclusion of a series of bilateral agreements.
As these become fully appreciated and invariably observed, further facts may be successively introduced: in the one case, the numbers of stamens and pistils, the forms of the flowers, whether radial or bilateral in symmetry, the arrangement and character of the leaves, whether opposite or alternate, stalked or sessile, smooth or hairy, serrated, toothed, or crenate; in the other, the divisions of the body, the segments of the abdomen, the markings of the wings, the number of joints in the legs, and the forms of the smaller organs the system pursued throughout being that of making it the child's ambition to say respecting everything it finds all that can be said.
It partakes of the nature of what lawyers call a bilateral contract, imposing duties and obligations on both sides, and these liabilities can only be removed as in the case of the Disestablished Irish Church by the consent of both the contracting parties to the treaty.
We must continue to support those activities, bilateral and multilateral, which aim at improving food production especially in developing countries and assuring global food security. These measures are necessary to the maintenance of a stable and healthy world economy.
To return, however, to the subject of homological relations: it is surely inconceivable that indefinite variation with survival of the fittest can ever have built up these serial, bilateral, and vertical homologies, without the action of some special innate power or tendency so to build up, possessed by the organism itself in each case.
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