The genus Astractura has the form of a regular cross, four radial arms being opposite in two equatorial diameters perpendicular one to another.
Coccodiscida# with four solid radial spines on the margin of the disk, crossed in two equatorial diameters perpendicular one to another.
All rings of the disk nearly of the same breadth, not concentric, half-spiral, interrupted by four zigzag-shaped radial beams crossed in two diameters perpendicular one to another.
The genus Staurodictya is characterised by four marginal spines, lying opposite in pairs in two crossed equatorial diameters of the disk, perpendicular one to another.
Spongodiscida# with four solid radial spines on the margin of the circular or square disk, commonly crossed in two equatorial diameters perpendicular one to another.
Brown & Sharpe micrometer fitted with a sensitive arrangement for testing and inspecting the diameters of pieces which must be within certain close limits of variation.
The top and bottom edges are rounded, so that the diameters of holes may be easily measured.
The column is nine diameters in height, with a base, while the capital is more ornamented than the Doric.
The columns were fluted, and were generally about six diameters in height; they diminished gradually upward from the base, with a slightly con vexed swelling; they were surmounted by capitals regularly proportioned according to their height.
The column, simply set upon the stylobate, without base or pedestal, was from four to six diameters in height, with twenty flutes, having a capital of half a diameter.
The Doric order possessed a peculiar harmony, but taste and skill were nevertheless necessary in order to determine the number of diameters a column should have, and also the height of the entablature.
The entablature which the column supported was also of a certain number of diameters in height.
These whirls may be small eddies, local in effect, or vast cyclones with diameters of fifteen hundred miles.
The halo when complete consists of two large circles whose diameters are constant, 45 and 92 degrees.
In the Wright aeroplane the lifting power is obtained by two parallel horizontal planes of canvas stretched over retaining-frames, placed with their long diameters transversely to the direction of flight, as in the case of the wings of a bird.
This consists of a circle of metal, arranged to be suspended from a ring at the side, so that one of its diameters would maintain the horizontal position through the effect of gravity.
At B is shown the edge of a pustule enlarged one hundred diameters and seen in section; to show the whole of a pustule in section from six inches to a foot of space would be required.
Sidenote: Full Vertical Surface Enrichment] Inceptive Axes: Diameters or diagonals of the area.
Difference of the Diameters will shew the Proportion there is of her Distance, with the Semi-diameter of the Earth.
For, if the Observation of the Diameters be exact; as in these Situations the Moon changes not considerably her Distance from the Earth in 6.
The true North Pole is about 1 1/2 degree or 3 diameters of the full moon, apart from the Pole star; and its place is on a line between the Pole Star and the Great Bear.
The formula above given may be used to determine the diameters of a pin at various cross sections that will make the maximum stress, S, at each of these cross sections constant.
For longer poles the diameters at the butt should increase up to at least eighteen inches for a round pole sixty feet long.
Both the unequal distribution of alternating current over the cross-section of a conductor and the inductance of circuits make it desirable to keep the diameters of transmission wires as small as other considerations permit.
Other experiments have shown that with a given voltage and distance between conductors the loss of energy from wire to wire decreases rapidly as their diameters increase.
In order to keep the current leakage over these discs within proper limits, the diameters of the discs must increase with the voltage of the circuit.
The rotative speeds of turbines, operating under any given head, should thus increase as their capacities and diameters decrease.
But as the water may be applied at one or more points on the circumference of an impulse-wheel, as desired, such wheels may have much greater diameters than pressure turbines for equal power under a given head.
X, from which the diameters at all cross sections of a tapered pin above its shoulder, that will give it a strength just equal to that of a section of 1.
Furthermore, since the measurement of maximum diameters is sure and easy and may be obtained with exactness, regardless of the thickness of the hair, it may be applied in anthropological research to all subjects.
Measurements of diameters and angles are also taken on the face of the living subject and indices are obtained.
Consequently the transformation consists in a notable difference in the proportion between the width and depth of the chest, that is, between the antero-posterior and the transverse diameters (see chapter on Technique).
The two diameters referred to above are almost equal (Fig.
To properly study this in its further changes, a power of from three to four thousand diameters must be used, and with this I know of few things in the whole range of minute beauty more beautiful than the effect of what is seen.
To return to the spacing of rods in the bottom of a T-beam; the report of the Joint Committee advocates a horizontal spacing of two and one-half diameters and a side spacing of two diameters to the surface.
Anchorage or grip in the concrete is all that can be counted on, in any event, to take up the tension of these stirrups, but it requires an embedment of from 30 to 50 diameters of a rod to develop its full strength.
The rule of spacing the bars not less than three diameters apart, is believed to be good practice.
There is not much room for objection to Mr. Thacher's rule of spacing rods threediameters apart.
For the same reason the rod between these bends should be at least 200 diameters in length.
Take 30 to 50 diameters from the floating end of these shear members, and, in some cases, nothing or less than nothing will be left.
These stress triangles will start on the rod 50 diameters back from the point in question and, although the author has indicated in Fig.
The squares of the cube roots of the masses divided by the squares of the diameters are as the periods of rotation.
From threediameters deduct 8-thousandths and 7-millionths of a diameter; to the result add five per cent.
Mr. Bonpland relates, that from the beginning of the phenomenon there was not a space in the firmament equal in extent to three diameters of the moon, that was not filled at every instant with bolides and falling-stars.
This will be readily apparent when it is understood that the helix angles of hobs vary in accordance with their diameters and, consequently, the difference between the normal pitch and the axial pitch correspondingly varies.
In a circle, all the diameters are equal to one another; but if we take a metallic wire or hoop, and draw it out on opposite sides, we elongate it into an ellipse, of which the different diameters are very unequal.
But a much more important proposition is attributed to Hippocrates; he is said to have been the first to prove that circles are to one another as the squares on their diameters (= Eucl.
Archimedes says further that the theorem that spheres are in the triplicate ratio of their diameters was proved by means of the same lemma.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "diameters" in a variety of sentences. We hope that you will now be able to make sentences using this word.
