While such minute and gradual variations are harmless for most optical purposes, sudden variations which generally take the form of striae or veins are fatal defects in all optical glass.
With changes of the pressures of the blood in arteries, veins or capillaries, and in the heart itself and its respective chambers, static changes are apt to follow in these parts; such as degeneration of the coats of the arteries, due either to the silent tooth of time, to persistent high blood pressures, or to the action of poisons such as lead or syphilis.
His face was livid, the veins standing out on his neck.
He had enough alcohol in his veins to believe he could drive, and too much pride to leave the party in the passenger seat.
Veins of antimony are worked in the Battle Mountain District and in Bullion Canyon, 15 m.
It occurs in its matrix, either in or closely associated with fissure veins or disseminated through rock masses.
A moment later, veins of light threaded through dark low clouds.
Such crystals occur either in cavities in mineral-veins and in granitic rocks, or as a lining in agate geodes.
Galena occurs in veins in the Cambrian clay-slate, accompanied by copper and iron pyrites, zinc-blende, quartz, calcspar, iron-spar, &c.; also in beds or nests within sandstones and rudimentary limestones, and in a great many other geological formations.
Their movement in an upward or downward direction in Limulus and Mygale must exert a pumping action on the blood contained in the dorsal arteries and the ventral veins respectively.
Besides the alluvial deposits a little mining is carried on, gold being present in the thin veins of quartz which cross the sandstone.
The main mineral deposits are the nickel ores, occurring as veins of garnierite, associated with peridotite dikes, in the ancient rocks of the eastern slope of the island.
Shrunk and cold, As if her veins were sapless and old, And she rose up decrepitly For a last dim look at earth and sea.
He was lying on his back propped up high, and his small bony hands with their knotted purple veins were lying on the quilt; his left eye gazed straight before him, his right eye was awry, and his brows and lips motionless.
She rested her head against the steering wheel, frustration making her veins swell.
He'd forced her to stay awake through it all despite her fainting spells, tearing open her veins and feeding until she was too weak to fight him.
Xander's muscular frame was tense enough that she saw the veins on his biceps.
A characteristic of the class is afforded by the complicated network formed by the leaf -veins, - well seen in a skeleton leaf, from which the soft parts have been removed by maceration.
The hornsilvers all occur under similar conditions and are often associated together; they are found in metalliferous veins with native silver and ores of silver, and are usually confined to the upper oxidized parts of the lodes.
A characteristic feature of cancer is the carrying of the epithelial cells (which are the essential element of the growth) to the nearest lymphatic glands, and in cancer of the stomach the secondary implication of the glands may cause the formation of large masses between the stomach and the liver, which may press upon the large veins and give rise to dropsy.
Veins and flat deposits below the general level Boring of the country; or the outcrop lies beyond the limits of the property or under water or water-bearing formations, or is covered by quicksand, or is deeply buried.
She wore those half-stockings that were supposed to be hidden by something far longer than what covered her pudgy legs, which were streaked with the stark blue of veins looking like a map of a very congested and curvy area.
A wave of anger came out of nowhere, surging through her veins and washing the resentment to the surface of her consciousness.
She boasts of the royal blood which ran through her veins, and disregarding the bar sinister she claims affinity with Charles X.
The veins of the leaves are next impressed by means of a die, and the petals are given their natural rounded forms by goffering irons of various shapes.
John Norquay, in whose veins ran a large admixture of Indian blood.
Pharmacosiderite is a mineral of secondary origin, the crystals occurring attached to gozzany quartz in the upper part of veins of copper ore.
Lastly, to pass over unnecessary details, the markings of various kinds to be observed on the lobes of the livers of freshly-slaughtered animals, which are due mainly to the traces left by the subsidiary hepatic ducts and hepatic veins on the liver surface, were described as "holes," "paths," "clubs" and the like.
The chestnut oaks of America represent a section distinguished by the merely serrated leaves, with parallel veins running to the end of the serratures.
The deposits are superficial, resulting from the opening out of veins at the surface, and consist chiefly of haematite.
There are likewise two pulmonary veins, entering the left atrium by one orifice.
The lymph vessels of the tail and hinder parts of the body enter the hypogastric veins; and at the point of junction, on either side, lies a small lymph heart, which often persists until maturity.
His most important work was 11Epi cuo ew (De natura), of which considerable fragments are extant (chiefly in Simplicius); it is possible that he wrote also Against the Sophists and On the Nature of Man, to which the well-known fragment about the veins would belong; possibly these discussions were subdivisions of his great work.
Veins of amethystine quartz are apt to lose their colour on the exposed outcrop.
33) These festivals formed the veins and arteries of ancient Hebrew Internat.
- To its mineral wealth Nevada owes its existence as a state; but for the richness of its veins of gold and silver ore it would be still little more than an arid waste.
Copper, lead and zinc are produced in small quantities, being found in fissure veins with gold and silver.
Beautiful rock crystals occur in veins in the corries.
The wings, which are not capable of being folded, are usually transparent, but occasionally pigmented and adorned with coloured spots, blotches or bands; the wing-membrane, though sometimes clothed with minute hairs, seldom bears scales; the wing-veins, which are of great importance in the classification of Diptera, are usually few in number and chiefly longitudinal, there being a marked paucity of cross-veins.
This collateral supply not being sufficient to keep up the proper flow of blood through the part the veins tend to become thrombosed, thus increasing the engorgement.
On the other hand, in the case of less regular deposits, including most metalliferous veins, and especially those of the precious metals, the uncertainty is often very great, and it is sometimes necessary to work on a small scale for months before any considerable expenditure of money is justified.
The examination of small test-pieces of the glass withdrawn from the crucible by means of an iron rod having shown that the molten mass is free from bubbles, the stirring process may be begun, the object of this manipulation being to render the glass as homogeneous as possible and to secure the absence of veins or striae in the product.
I shall never forget how the fury of battle throbbed in my veins--it seemed as if the tumultuous beating of my heart would stop my breath.
Drain the blood from men's veins and put in water instead, then there will be no more war!
Holmes (Caesar's Conquest of Gaul, 1899), who comes to the conclusion that "when the Reman delegates told Caesar that the Belgae were descended from the Germans, they probably only meant that the ancestors of the Belgic conquerors had formerly dwelt in Germany, and this is equally true of the ancestors of the Gauls who gave their name to the Celtae; but, on the other hand, it is quite possible that in the veins of some of the Belgae flowed the blood of genuine German forefathers."
72, had Seleucid blood in its veins through the marriage of a Seleucid princess with Mithradates Callinicus, and regarded itself as being a continuation of the Seleucid dynasty.
Conrad Weiser, a well-known Indian interpreter, and herself said to have had Indian blood in her veins; by her he had eleven children.
Pectolite is a secondary mineral occurring as white masses with a radially fibrous structure in the veins and cavities of basic igneous rocks.
Large sheets of muscovite, such as are of commercial value, are found only in the very coarsely crystallized pegmatite veins traversing granite, gneiss or micaschist.
These veins consist of felspar, quartz and mica, often with smaller amounts of other crystallized minerals, such as tourmaline, beryl and garnet; they are worked for mica in India, the United States (South Dakota, Colorado and Alabama), and Brazil (Goyaz, Bahia and Minas Geraes).
Since the mineral occurs in definite veins, a more satisfactory and economical method of working would be that adopted in metalliferous mines, with a vertical shaft, cross-cuts, and levels running along the strike of the vein: the mica could then be extracted by overhead stopping, and the waste material used for filling up the worked-out excavations.
Opening in pairs in each somite, right and left into the pericardial sinus are large veins, which bring the blood respectively from the gill-books and the lungbooks to that chamber, whence it passes by the ostia into the heart.
In the larger veins of the leaf especially in the midrib, in the petiole, and in the young stem, a1 extremely frequent type of mechanical tissue is collenchyma.
ANT-LION, the name given to neuropterous insects of the family Myrmeleonidae, with relatively short and apically clubbed antennae and four large densely reticulated wings in which the apical veins enclose regular oblong spaces.
Ethnologically the Bulgarians ought perhaps to come here; but, as a large admixture of Slav blood flows in their veins and they speak a distinctly Slav language, they have in this table been grouped with the Slays.
There are veins of bismuth near Sodaville.
The wings in nearly all species have a dappled or speckled appearance, owing to the occurrence of blotches on the front margin and to the arrangement of the scales covering the veins in alternating light and dark patches (Austen).
Galena and other lead ores are abundant in veins in the limestone, but they are now only worked on a large scale at Mill Close, near Winster; calamine, zinc blende, barytes, calcite and fluor-spar are common.
Galena and other lead ores are abundant in veins in the limestone, but they are now only worked on a large scale at Mill Close, near Winster; calamine, zinc, blende, barytes, calcite and fluor-spar are common.
Barytes is of common occurrence in metalliferous veins, especially those which yield ores of lead and silver; some of the largest and most perfect crystals of colourless barytes were obtained from the lead mines near Dufton in Westmorland.
(After Lankester and Boerne from Parker and Haswell's Textbook of Zoology, Macmillan & Co.) these open into irregular swollen vessels which are the veins or venous sinuses.
In any case it is clear that we have in these muscles an apparatus'for causing the blood to flow differentially in increased volume into either the pericardium, through the veins leading from the respiratory organs, or from the body generally into the great sinuses which bring the blood to the respiratory organs.
"Nonsense!" he cried, and the veins on his forehead and neck stood out like cords.
As the grandson of St Ladislaus, Manuel had Hungarian blood in his veins; his court was the ready and constant refuge of the numerous Magyar malcontents, and he aimed not so much at the conquest as at the suzerainty of Hungary, by placing one of his Magyar kinsmen on the throne of St Stephen.
At length the sun's rays have attained the right angle, and warm winds blow up mist and rain and melt the snowbanks, and the sun, dispersing the mist, smiles on a checkered landscape of russet and white smoking with incense, through which the traveller picks his way from islet to islet, cheered by the music of a thousand tinkling rills and rivulets whose veins are filled with the blood of winter which they are bearing off.
She traced the veins on his hand and caressed his arm.