Calx sulphurata in pill form, one-tenth to one-fourth grain four or five times daily, is said, acts well in the pustular variety.
In those the calx has previously acquired the intended colour, a colour which bears a red heat without injury, and all that remains is to fix it on the piece by a vitreous flux.
Calx Saccharata: in milk, when the tongue is black and parched.
Calx Saccharata: in milk, when the tongue is black and coated.
Calx Saccharata: in the chronic diarrhea and vomiting of young children.
It seems also to be pretty evident, from this experiment, that the precipitate above mentioned is a real calx of the metal, by the solution of which the nitrous air is generated.
This is a remarkable circumstance, that the fire-air which had previously removed from the mercury its phlogiston in a slow calcination, gives this same phlogiston up to it again when the calx is simply made red-hot.
In this case no red sublimate arose as customarily takes place with that calx which is prepared by the acid of nitre.
I precipitated with alkali of tartar a solution of gold which was made with aqua regia; I reduced in the foregoing manner the washed and dried calx of gold.
I then placed this calx of silver in a small glass retort on the open fire for reduction, and fastened an empty bladder to the neck.
Mercury converted into calx by the acid of nitre, or red precipitate, treated in the same way behaved similarly.
As soon as thecalx began to glow, the bladder became expanded, and quicksilver rose into the neck.
The calx was heavier than the metal from which it had been produced.
This air mixes itself with the calx (frequent agitation conducing), and attaches itself to the minutest molecules, in the same manner as water renders heavy sand which is agitated with it, and moistens and adheres to the smallest grains.
By dissolving metals in acids, the phlogiston was driven off and the calx remained: by heating the calx in hydrogen, the phlogiston was again absorbed and the calx reduced to the metallic state.
To prove the truth of this opinion, he showed that when the oxide of iron is heated in hydrogen gas, that gas is absorbed, while the calx is reduced to the metallic state.
He therefore inferred, that this portion of air had united with the tin, and that calx of tin is a compound of tin and air.
It was obviously impossible, then, that the metal could be a combination of the calx and hydrogen.
As one grain of turpeth mineral (vitriolic calx of mercury) mixed with ten grains of fine sugar.
On the parts not excoriated mercurial ointment, made of one part of white calx of mercury and six of hogs' fat.
The realcalx of bismuth would probably have the same ill effect.
Mix the calx of Antimony, which you intend to reduce, with an equal quantity of black soap.
Take any quantity you please of calx of Antimony, made without addition; put it into a good crucible, which set in a melting furnace: kindle the fire gradually, and leave the crucible uncovered at the beginning.
Pound this Regulus, and mix it with half its weight of an antimonial calx as perfectly desulphurated as possible.
While it is in fusion there gathers incessantly on its surface, as on that of Tin, a blackish dusty pellicle, which is nothing but a calx of Lead.
They may be considered as the very calx of Zinc, or its metallic earth robbed of its phlogiston, and sublimed during the combustion of this semi-metal, being probably carried up by the phlogiston in flying off.
There are several ways of doing this: one of the most expeditious is to flux it with Nitre, which burns and converts to a calx the semi-metal with which the Silver is adulterated.
A quarter of an hour after the matter is red-hot, cover the crucible, and excite the fire vigorously till the calx melt.
In the former we added one part only of Nitre to one part of Antimony; but in this three parts of Nitre are put to one of the mineral; and the calx resulting from this mixture is of course very different from the other.
The calx of Copper perfectly calcined is with great difficulty brought to fusion: yet, in the focus of a large burning-glass, it melts and turns to a reddish and almost opaque glass.
This calxof Iron has the singular property of flowing in the fire with somewhat less difficulty than Iron itself; whereas every other metalline calx flows with less ease than the metal that produced it.
This calx is not volatile like the Regulus, but will endure a very violent fire; and being exposed thereto will flow, and turn to a glass of the yellowish colour of a hyacinth.
This calx may be separated from the alkali, if an acid be employed to precipitate it; and then it is called Materia Perlata.
He then showed by experiment that when calxof iron is heated with hydrogen, the hydrogen disappears and the metal iron is produced.
A little later Lavoisier completed the proof of the composition of water by showing that when steam is passed through a tube containing iron filings kept red hot, inflammable air is evolved and calx of iron remains in the tube.
The antiphlogistic school said that calx of iron is composed of iron and dephlogisticated air; the phlogisteans said it was iron deprived of its phlogiston.
The metal, said Lavoisier, decomposes the water which is always present along with the acid, hydrogen is thus evolved, and the metallic calx or oxide so produced dissolves in the acid and forms a salt.
And they answered as triumphantly, Because these metals lose phlogiston by this process, and we know that a calx is a metal deprived of its phlogiston.
But at a later time it was proved that iron was also produced by heating the calx of iron with carbon.
The calx of tin resists fusion more than that of any other metal, which makes it useful in making an opaque white enamel.
It contains much of the calx of manganese, and iron; but when the substance is pulverized, these are easily dissolved, and the calx of wolfram is found to be yellow.
Dephlogisticated marine acid converts the calx of arsenic into arsenical acid by giving it pure air.
The calx of manganese is used in making glass; the glass destroying the colour of that of the other materials, and thereby making the whole mass transparent.
The residuum consists of revived mercury, with some regulus and calx of antimony.
Thus when phlogisticated alkali is poured into a solution of green vitriol, the acid of the vitriol unites with the alkali, while the phlogiston joining the calx of iron makes Prussian blue.
The calx of cobalt is of a deep blue colour, which, when fused, makes the blue glass called smalt.
This calx is soluble in about eighty times its weight of cold water, or in fifteen times its weight of boiling water.
To make glass perfectly colourless, and at the same time more dense, commonly called flint glass, manufacturers use a certain proportion of calx of lead and manganese.
In answer to this it is said, that the pure air expelled from the calxuniting with the inflammable air in the vessel, recomposes the water found after this process.
It could not consequently be true that calx of tin was tin deprived of phlogiston.
An enormous quantity of phlogiston with which some calces, as calx of manganese, are capable of combining, destroys the metallic appearance of the body, and renders it incapable of dissolving in acids.
If we drive off the whole phlogiston we can scarcely unite the calx with phlogiston again, or bring it back to the state of a metal: hence the extreme difficulty of reducing the calx of zinc, and even the red calx of iron.
The affinity between a metallic calx and phlogiston is strong; but the facility of union is greatly promoted when the calx still retains a little phlogiston.
To restore this calx again to the state of metallic lead, we have only to heat it in contact with almost any combustible matter whatever.
The calx united to a little phlogiston still retains its earthy appearance--a certain additional portion restores the calx to the state of a metal.
The calx was then distilled in a heat gradually raised to redness; but not a particle of mercury was obtained.
It was observed very early that when a metal was converted into a calx its weight was increased.
The metals are the substances which leave a calx behind them when burnt, and sulphur and phosphorus leave an acid.
It is hot and dry, he says, but in the calx of it there is humidity.
When lead is kept nearly at a red heat in the open air for some time, being constantly stirred to expose new surfaces to the air, it is converted into the beautiful pigment called red lead; this is a calx of lead.
When lead is kept nearly at a red-heat in the open air for some time, it is converted into a pigment called red lead; this is a calx of lead.
It may be said, that calx were decomposed into alkali and carbon; water into oxygen and acid.
Thereupon new precipitations of salt succeeded, the gypsum and calx being again dissolved, and consequently diminutions also of water, whereby rivers again originated.
In granite the commencement is crystal, but in lime it is the termination; crystallization determines the character in granite, in calx or lime, however, the crystals are only blossoms.
Of a certainty neither clay, sand, talc, or calx become metal.
