When dried they become more brittle and more splintery, and sometimes their surfaces get covered at old fractures with a thin film or crust ofopaque silex.
The quill, rendered soft and elastic by the heat, endures the strong scraping action of the tool, and thus gets stripped of its opaque outer membrane, without hazard of being split.
It often happened that the mixture for topazes gave only anopaque mass, translucent at the edges, and in thin plates of a red colour.
If they be opaque or whey coloured, there is some unsoundness in the wort.
Impure and opaque vitriform masses are called slags; such are the productions of blast iron furnaces and many metallurgic operations.
They are all solid; heavier than water; in general opaque and brittle; many have an acrid taste, and a strong smell; their colour is very variable.
This is an opaque substance, of a dark-gray or leaden hue; slightly malleable, and easily cut with a knife, when it betrays a metallic lustre.
As thus obtained, it is in yellow compactopaque masses, of a glassy aspect; affording a powder of a pale yellow colour.
Too much driers in varnish render it opaque and unfit for delicate colours.
The oxide thus obtained has a straw yellow colour, and fuses at a high heat into an opaque glass of a dark-brown or black colour; but which becomes less opaque and yellow after it has cooled.
But what was his amazement when he saw an opaque body of enormous dimensions blocking up the passage!
About fifteen hundred feet from the ground, it encountered an opaque mass of cloud, and entered a dense fog, suspended at that elevation; but it did not meet with the least breath of wind.
You see what an opaque gem this youth is, who follows his friends through all France, without opening to his communicative friend and travelling companion, even a fold or a loophole in his relation to them.
The energy of light has not been destroyed, but as its energy cannot pass through the opaque body, it has been employed in agitating the particles and atoms of that body, which becomes hotter in consequence.
When light, which is a form of energy, is absorbed by any opaque body, it is found that the body which has absorbed it has become hotter.
The first part makes the luminous bodies as sun and stars, the second part is the transparent substance of the skies, and the third part is the material of opaque bodies as the earth, planets and comets.
The inner coats of the mucous membrane of the gullet and stomach are in part converted into opaque yellow and black eschars, and in part to a shreddy pulpy condition.
The outlines of the hepatic lobules were very distinct, each central vein being surrounded by an opaque yellowish zone; when fresh the hue was more uniform, and the section was yellowish-white in colour.
While the effect of colored clay under opaque glaze is less pronounced, it still makes sufficient difference to be considered.
For studio work the most pleasing white surface is found in an opaque enamel, but for the most part the craftsman will wish to work for colored tile.
Matt glazes are characterized by certain of these ingredients being present in excess; and stanniferous or tin glazes are, as the name implies, rendered opaque by the use of oxide of tin.
Palissy essayed to imitate this wonder but attacked the problem from the standpoint of an opaque glaze.
The opaque tin enamel given on page 134 will answer well and if the whiteness prove too intense it may be modified by a very small addition of under-glaze color according to the tint desired.
The best and noblest coloring possible to art is that attained by the touch of the human hand on an opaque surface, upon which it can command any tint required, without subjection to alteration by fire or other mechanical means.
Now, color is producible either on opaque or in transparent bodies: but form is only expressible, in its perfection, on opaque bodies, without lustre.
No perfect or refined form can be expressed except in opaque and lustreless matter.
The words Germany, Austria, Turkey, Naples, Sicily, and the rest would have to be simply painted in opaque colour upon the translucent glass.
The painter would trace a head in not quite solid lines of brown, and then strengthen them here and there with perfectly opaque colour, producing by that means a much softer quality of line.
It is by no means certain, even, that the first glaziers were directly inspired by mosaic, whether of marble or of opaque glass.
He would have no need to separate his enamel colours by a line of lead, and where he wanted a dividing line he would just paint it in opaque brown.
The excessive use of opaque paint was not so much a new departure as the exaggeration of a tendency which had grown with the growth of glass painting itself.
In proportion as it is less opaque than alabaster, glass is less perceptibly affected by changes of light; but, whether we perceive it or not, it owes all its effect to the light shining through it.
Michael, supplementing the most delicate painting with touches of opaque colour, which in less skilful hands would have been brutal, show the master artist in glass painting.
The method of mosaic, eked out with a minimum of tracing in opaque pigment, does not lend itself very kindly to picture; and it is in ornament that the thirteenth century glazier is pre-eminent.
As the Roman coated his dull blue withopaque white glass, so he coated translucent white with rich pot-metal colour.
The opposite walls of the vein are in some parts incrusted with transparent crystals of quartz, the middle of the vein being filled up with common opaque white quartz.
We shall demonstrate hereafter that by this process the same penetrability may be inferred also as relating to opaque bodies.
When not sucked up again these drops of liquid dry, and produce round marks with an opaque center and rim and an intervening less opaque area.
An opaque or milk-white chalcedony, a variety of quartz; also, a similar variety of opal.
Salviati, being seen as straw-coloured with a transmitted light, but assuming a faint lilac tint against an opaque absorbent surface.
Some of these have been found in tombs and other places with the color changed to an opaquewhite by the action of fire.
In the intensely cold temperature the water froze as it dripped, the icicles finally joining to make an opaque windowpane, crude but serviceable.
There were two windows with panes made of opaque ice.
It was a warm evening, and when they arrived at their journey's end distant thunder rolled behind heavy and opaque clouds.
She knew little of the nature of the town bachelor; there were opaque depths in him which her thoughts had never definitely plumbed.
The snow fell thicker and thicker, and as the storm rose it was swept hither and thither in blinding banks and opaque masses until every familiar object was hidden.
Clouds and banks of snow rush hither and thither in opaque masses; the bitter hail and sleet seem to drive through you.
Meyer); if pure it solidifies to a non-crystalline mass, and if impure to an opaque mass whose surface is not smooth.
The prism and table are covered with an opaque cover.
Some known varieties of the diamond are almost opaqueand of a black colour.
Directly in front of the plate holder is placed an opaque screen perforated with a horizontal slit the width of the photographic plate used.
As it is the object to obtain a perfectly transparent, glass-clear silhouette upon an absolutely opaque ground, but a very short time of exposure is required.
If not then ripe, put it back into the opaque bag for a day or two till ready to pick.
The nude flesh, though not covered with opaque paint, has received some application which differentiates it from the glittering white background, and gives it a sort of ivory hue.
The marine worm, Chaetopterus, is brightly luminous and lives its whole life in anopaque parchment tube.
The light cells proper are often associated with reflectors, lenses, opaque screens and color screens.
It is all visible light, containing no infra-red or ultra-violet radiation or rays which are capable of penetrating opaque objects.
There is, then, no specific emission of X-rays or similar penetrating radiation from luminous tissues which will affect the photographic plate through opaque screens.
Two coloured media were prepared, one of which transmitted the upper portion of the spectrum and was opaque to the lower portion, while the second was opaque to the upper and transparent to the lower part of the spectrum.
This shows that the fluid is very opaque to the ultra-violet rays.
Judged by the autographic records it is still almost opaque to sunshine strong enough to burn the card of the recorder during the winter months.
I don't know what a "far cry" is, but I have come across it in some of our most opaque dissertations, and accordingly I welcomed the opportunity to use it.
Graves, Importer, whose name appeared in modest letters upon the opaque glass door on the seventh story.
The iron pillar that he had seen came through the floor and terminated some five feet above it in another of the opaque glass domes, filled with iridescent fire.
Von Kettler stepped to a switch attached to a stanchion of white metal, surmounted by a huge opaque glass dome, and threw it over.
