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It is, however, of the nature of stem. The root grows only at the end, from a point just behind the tip; the stem elongates throughout its whole length. This can be shown by marking the stem and roots of a young seedling with ink. India ink must be used, as common ink injures the plants. Dip a needle in the ink and prick a row of spots at equal distances on a young root.
It elongates, forming a kind of cup-like base or stem, the upper end spreads somewhat, the depression at its centre deepens, a mouth is formed that gapes widely and opens into the digestive cavity, and the upper margin spreads out to form a number of tentacles, few at first, but growing more and more numerous till a wreath is completed all around it.
They go on multiplying, take up water, and nourish themselves on the granular nutritive matter present from the first in the egg-cell. The little mass elongates, increases in size, and gradually assumes the form of a young tadpole.
When the muscles of the heart cease to act, the refluent blood again distends or elongates them; and thus irritated they contract as before. The same happens to the arterial system, and I suppose to the capillaries, intestines, and various glands of the body.
The tying up will need to be repeated as the stem elongates, which it will do very rapidly.
As the stem of the branches elongates, these pairs of leaves are found scattered along its length, and it is only in the ears, or spikes of some genera, that we find them growing so compactly on the axis as to form a close head.
Sister Slocum becomes as one dumb, the good fat man is seized with a nervous fit, the man in the spectacles hangs his head, and runs his fingers through his crispy hair, as Brother Spyke elongates his lean body, and is seen going into a melancholy mood, the others gathering round with serious faces. Lady Swiggs commences describing with great minuteness the appearance of Mr. Tom Toddleworth.
In from twenty-four to thirty-six hours, the capillaries of the part adjacent to the wound begin to throw out minute buds and fine processes, which bridge the gap and form a firmer, but still temporary, connection between the two sides. Each bud begins in the wall of the capillary as a small accumulation of granular protoplasm, which gradually elongates into a filament containing a nucleus.
The fixed perspective of Paris neither elongates nor contracts with any change of atmosphere, so that the apparent distance from one point to another remains always the same. Reduced to the simplest elements the street architecture of Paris consists of two parallel lines, which to the eye appear to gradually converge.
In their method of growth we find one of the most characteristic features. They universally have the power of multiplication by simple division or fission. Each individual elongates and then divides in the middle into two similar halves, each of which then repeats the process.
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