Exposure at night should be avoided.
Deposits of sulphur are frequently formed by the decomposition of hydrogen sulphide, on exposure to the atmosphere: hence natural sulphureous waters, especially hot springs, readily deposit sulphur.
After the testing is over, the hard part begins; weighing and recording my compilations and comparing them to past exposure levels.
In December 1854, after a fatiguing address to a public meeting, followed by prolonged exposure to a south-east gale, his constitution entirely broke down.
During this exposure it is kept continually moistened with water, so that it ultimately falls to a very fine powder.
It resembles the Sao Francisco region in its uncertain rainfall and exposure to droughts, and in having large areas of campos suitable for grazing purposes.
Varies from yellow-green to deep crimson in different species and in individuals according to exposure to sunlight and other conditions.
Its viscid character, and its non-liability to dry and harden by exposure to air, also fit it for various other uses, such as lubrication, &c., whilst its peculiar physical characters, enabling it to blend with either aqueous or oily matters under certain circumstances, render it a useful ingredient in a large number of products of varied kinds.
On exposure to light the colour quickly darkens.
The practices of exposure and sale of children, and of giving them in pledge for debt, are forbidden.
It forms a golden yellow crystalline mass, which sublimes slowly in vacuo, and melts at 25.5° C. It blackens on exposure to moisture, and decomposes when exposed to light.
It dissolves in acids forming cobaltous salts, and on exposure to air it rapidly absorbs oxygen, turning brown in colour.
After two hours' exposure, it is wrapped round a frame supported in a given position relative to Elster and Geitel's dissipation apparatus, and the loss of charge is noted.
With Three Hours' Exposure He Found The Thorium Emanation Only From 3 To 5% Of The Whole, But With 12 Hours' Exposure The Percentage Of Thorium Emanation Rose To About 15.
These Figures Refer To The State Of The Wire Immediately After The Exposure; The Rate Of Decay Is Much More Rapid For The Radium Than For The Thorium Emanation.
It is very hygroscopic, dissolves readily in water, and rapidly undergoes oxidation on exposure to air.
The value of oak bark depends upon the amount of tannin contained in it, which varies much, depending not only on the growth of the tree but on the care bestowed on the preparation of the bark itself, as it soon ferments and spoils by exposure to wet, while too much sun-heat is injurious.
Minghetti, in a trenchant exposure of the parliamentary condition of Italy during this period, cites a case in which a credit for certain public works was, during a debate in the Chamber, increased by the government from 6,600,000 to 9,000,000 in order to conciliate local political interests.
On exposure to heat, amethyst generally becomes yellow, and much of the cairngorm or yellow quartz of jewellery is said to be merely "burnt amethyst."
It is a colourless, highly refracting liquid, boiling at 78°; it fumes on exposure to moist air.
His Essai sur la societe des gens de lettres avec les grands was a worthy vindication of the independence of literary men, and a thorough exposure of the evils of the system of patronage.
It is the adrectal gland, and in the genera Murex and Purpura secretes a colourless liquid which turns purple upon exposure to the atmosphere, and was used by the ancients as a dye.
The circumstance that the gold turned black on exposure to the humid air (owing to the presence of silver) gave the name of Ouro Preto to the mountain spur and the settlement.
(2) Sale of children by their free parents, which was tolerated, except in Attica, or their exposure, which was permitted, except at Thebes.
If the plants are subjected to some process, before mounting, by which injurious organisms are destroyed, such as exposure in a closed chamber to vapour of carbon bisulphide for some hours, the presence of pieces of camphor or naphthalene in the cabinet will be found a sufficient preservative.
They are easily oxidized to the corresponding fatty acid, in many cases simply by exposure to air.
Most woods in durability, and none stand better alternate exposure to drought and moisture, while under cover it is nearly indestructible as long as dry-rot is prevented by free admission of air.
The oak will not bear exposure to the full force of the sea gale, though in ravines and on sheltered slopes oak woods sometimes extend nearly to the shore.
The oxides of type RO are soluble in water, the solution possessing a strongly alkaline reaction and rapidly absorbing carbon dioxide on exposure; they are basic in character and dissolve readily in acids with the formation of the corresponding salts.
This solution is not very stable, since on exposure to air it slowly oxidizes and becomes turbid owing to the gradual precipitation of sulphur.
Buchu leaves contain a volatile oil, which is of a dark yellow colour, and deposits a form of camphor on exposure to air, a liquid hydro-carbon being the solvent of the camphor within the oil-glands.
Heating or exposure to sunlight reduces it to the red oxide; it fires when ground with sulphur, and oxidizes ammonia to nitric acid, with the simultaneous formation of ammonium nitrate.
After gathering the fruit all the wood not needed for extending the tree or for fruit bearing next season should be cut out so as to give the shoots left full exposure to air and light.
This iron seems, however, in several respects to be unlike the celebrated large nodules of iron found by Nordenskiold at Ovifak, but appears to resemble much more closely the softer kind of iron nodules found by Steenstrup in the basalt;' it stands exposure to the air equally well, and has similar Widmannstaten figures very sharp, as is to be expected in such a large mass.
The rock on the surface is as hard as flint, but underneath it gradually softens and furnishes an admirable stone for building which can be sawn into blocks of any size, hardening on exposure to the atmosphere.
Potassium ruthenate, K2Ru04 H20, obtained by fusion of the metal with caustic potash and nitre, crystallizes in prisms which become covered with a black deposit on exposure to moist air.