B, C, D, E, enlarged.) branched rootstock from which spring slender aerial shoots which are green, ribbed, and bear at each node a whorl of leaves reduced to a toothed sheath.
In other cases the root structure of the stele continues up to the cotyledonary node, though the hypocotyl is still to be distinguished from the primary root by the character of its epidermis.
In all ants the second (apparently the first) abdominal segment is very markedly constricted at its front and hind edges, so that it forms a "node " at the base of the hind-body (fig.
In many of those ants whose third abdominal segment forms a second " node," the basal dorsal region of the fourth segment is traversed by a large number of very fine transverse striations; over these the sharp hinder edge of the third segment can be scraped to and fro, and the result is a stridulating organ which gives rise to a note of very high pitch.
The angle from the pericentre to the actual radius vector, and the length of the latter being found, the angular distance of the planet from the node in the plane of the orbit is found by adding to the true anomaly the distance from the node to the pericentre.
The motion of the node of this plane is found with great exactness from observaMass, of the g tions of the transits of Venus.
Its weak point is that the apparent motion of the node depends partly upon the motion of the ecliptic, which cannot be determined with equal precision.
From the observed motion of the node of Venus, as shown by the four transits of 1761, 1769, 1874 and 1882, is found Mass of (earth +moon) _Mass of sun 332600 In gravitational units of mass, based on the metre and second as units of length and time, Log.
We may represent the displacement due to one of the trains by y l =a sin 2 i (24) where x is measured as in equation (16) from an ascending node as A in fig.
The ordinate of the curve changes sign as we pass through a node, so that successive sections are moving always in opposite directions and have opposite displacements.
It is obvious that the nodes are alternately in compression and extension, or vice versa, and that for 4X on each side of a node the motion is either to it on both sides or from it on both sides.
He used a tube of variable length and determined the length resounding to a given fork, (1) when the closed end was the first node, (2) when it was the second node.
There is a node in the middle.
When the pipe is blown softly the fundamental is very predominant, and there is a node at the middle point.
Each of the first few harmonics may be easily obtained by touching the string at the first node of the harmonic required, and bowing at the first loop, and the presence of the nodes and loops may be verified by putting light paper riders of shape A on the string at the nodes and loops.
36, for the fundamental and the first harmonic. When a string is struck or bowed at a point, any harmonic with a node at that point is absent.
The next mode has a node in the middle and two others each 0.132 from the end.
The fundamental mode has that node only.
The next mode has a second node 0.226 from the free end; the next, nodes at 0.132 and 0 .
The lower end of the jet tube, being open, is a loop, and the node may be regarded as in an imaginary prolongation of the jet tube above the nozzle.
If the jet tube is somewhat longer than half the sounding tube there will be a node in it, and now the condition of equality of pressure requires opposite motions in the two at the nozzle, for their nodes are situated on opposite sides of that point.
The form of the limacon depends on the ratio of the two constants; if a be greater than b, the curve lies entirely outside the circle; if a equals b, it is known as a cardioid; if a is less than b, the curve has a node within the circle; the particular case when b= 2a is known as the trisectrix.
It is usual and in most cases necessary to cut away the lower portion of a cutting up to just below the node or joint (fig.
When two leaves are produced at the same node, one on each side of the stem or axis, and at the same level, they are opposite (fig.
When a single leaf with opposite stem with alteris produced at a node, and leaves.
In the lowest leaf is directly the point of insertion of the pair one leaf is in above the first, leaf in the node, dividing front and the other and commences the leaf into similar halves, at the back; in the the second cycle.
31, leaf 1 arises from a node n; leaf 2 is separated from it by an internode m, and is placed to the right or left; while leaf 3 is situated directly above leaf 1.
A, The branch with the leaves numbered in their order, n being the node and m the internode; b is a magnified representation of the branch, showing the points of insertion of the leaves and their spiral arrangement, which is expressed by the fraction or one turn of the spiral for two internodes.
Oedogonium sp., oogonium antheridium at a node on at moment of fertilization a lateral appendage.
From the first node arise rhizoids; from the second a lateral bud, which becomes the new plant.
In the higher normal modes there are nodes or points of rest (y = 0); thus in the second mode there is a node at a distance .1901 from the lower end.
In such cases they are very generally given off from just above each node (often in a circle) of the lower part of the stem or rhizome, perforating the leaf-sheaths.
They are solitary at each node and arranged in two rows, the lower often crowded, forming a basal tuft.
The spike of an inflorescence bears whorls of flowers at each node in the axils of concrescent bracts accompanied by numerous sterile hairs (paraphyses); in a male inflorescence numerous flowers occur at each node, while in a female inflorescence the number of flowers at each node is much smaller.