After a time, a delicate patch of cellular membrane appeared upon one face of this yolk, and that patch was the foundation of the whole creature, the clay out of which it would be moulded.

[Illustration: CELLULAR DEVELOPMENT.] 1075.

Sometimes a number of cylindrical cells are laid end to end, and, by the absorption of the transverse partitions, form a continuous tube, as in the sap-vessels of plants, or in muscular and nervous fibre; and when cells are thus woven together, they are called cellular tissue, which, in the human body, forms a fine net-like membrane, enveloping or connecting most of its structures.

Besides the cellular tissue, there is what is called a vascular system, which consists of another set of small vessels.

In the vascular system of a plant, we at once see the great analogy which it bears to the veins and arteries in the human system; but neither it, nor the cellular tissue combined, is all that is required to perfect the production of a vegetable.

The layers of wood, which appear in the stem or branch of a tree cut transversely, consist of different zones of fibres, each the produce of one year's growth, and separated by a coat of cellular tissue, without which they could not be well distinguished.

Some roots last one year, others two, and others, like the shrubs and trees which they produce, have an indefinite period of existence; but they all consist of a collection of fibres, composed of vascular and cellular tissue, without tracheae, or breathing-vessels.

Thours says, the cellular tissue contains a substance similar to sage.

Consequently there is no isolation, notwithstanding the cellular system.

The worthy M. Gustave de Beaumont, a great upholder of the cellular system, rode in a cell vehicle.

She has no vital parts, such as France has in Paris or Germany has in Silesia or Westphalia, upon which the life of the whole State organism depends; she is like some vast multi-cellular invertebrate animal which it is possible to wound but not to destroy.

Adj. capsular; saccular, sacculated; recipient; ventricular, cystic, vascular, vesicular, cellular, camerated, locular, multilocular, polygastric; marsupial; siliquose, siliquous.

Adj. cellular, spongy, spongious^; honeycombed, alveolar; sintered; porous (opening) 260.

The delicate-walled spherical, or polygonal, cells which make up the bulk of an herbaceous stem, constitute cellular tissue (parenchyma).

The green bark is of cellular tissue, with some green coloring matter like that of the leaves; it is at first the outer layer, but soon becomes covered with cork.

These are ends of the fibro-vascular bundles, which in these plants are scattered through the cellular tissue instead of being brought together in a cylinder outside of the pith.

The outer coating of the herbaceous stem is then stripped off, until the fibers or cellular parts are seen, when it undergoes the process of rotting, and after being well dried in houses and sheds, is prepared for market by assorting it, a task which is performed by the women and children.

Section of the lower part of the horn tubes shows them to contain a cellular debris.

As yet, these cellular ingrowths (which are destined to be the horny laminæ, and cut up the corium into sensitive laminæ) are free from irregularities or secondary laminæ.

M. Dutrochet, in a volume on the moving powers which act in organized bodies, affirms, that there are seen on the walls of the cellular and fibrous tissue of vegetables, small semi-transparent globular bodies and linear bodies, which become opaque from the action of acids, and are rendered transparent by that of alkalies.

To his dismay he found that the silent cellular system was even carried out in the chapel, where each prisoner had a sort of sentry-box to himself, and that the hour's promenade for exercise conversation was equally impossible.

From the last Wilson, with his sharp eyes, has picked several plant impressions, the last a piece of coal with beautifully traced leaves in layers, also some excellently preserved impressions of thick stems, showing cellular structure.

On the Darling Range is found a red cellular structure capping the granite, assuming all the appearance of having been subjected to fire; it extends also in the low country about that neighbourhood.

ALGÆ, sea-weeds and plants of the same order under fresh water as well as salt; they are flowerless, stemless, and cellular throughout.

It is, however, less rich in iron than would be inferred from its outward appearance, since the pebbles on being broken, exhibit interiorly a loose and cellular structure, where grains of quartz and plates of mica are interspersed with the ore, and of course reduce its specific gravity and value.