Now, thallium is a much more fusible and vaporizable metal than silver; and its vapour facilitates the passage of the electricity to such a degree, as to render the current almost incompetent to vaporize the more refractory silver.
But thethallium is gradually consumed; its vapour diminishes, the resistance rises, until finally you see the two silver bands as brilliant as they were at first.
The thallium band at first almost masks the silver bands by its superior brightness.
After waiting a little, we see that the green of the thallium lies midway between the two greens of the silver.
Indeed, the silver bands have wonderfully degenerated since the bit of thallium was put in, and for a reason worth knowing.
We will now remove the thalliumand put a bit of silver in its place.
The higher eutectic D may correspond to a complex of solid thallium and the compound; but the possible existence of solid solutions makes further investigation necessary here.
Thallium gives, when heated in a Bunsen flame, a magnificent green line, the centre of which corresponds with wave length 534.
In the ordinary method of analysis, when an acid liquid is first treated with sulphuretted hydrogen, and then made alkaline by ammonia and ammonic sulphide, thallium would be thrown down with the manganese and iron of the blood.
Thallium is eliminated through the urine, and is also found in the faeces; it passes into the urine from three to five minutes after injection: the elimination is slow, often taking as long as three weeks.
Separation ofThallium from Organic Fluids or Tissues.
Separation of Thalliumfrom Organic Fluids or Tissues, 676 4.
It is also useful to measure the green line ofthallium chloride = 535.
Lamy[973] used thallium sulphate, and found that dogs were salivated, and suffered from trembling of the limbs, followed by paralysis.
The nitrate and sulphate of thallium are both soluble in water, the carbonate less so, requiring about 25 parts of water for solution, while the chloride is sparingly soluble, especially in hydrochloric acid.
Thallium oxide resembles lead peroxide in color; at a strong heat it melts, becomes darker, and is converted into peroxide, in which state it can be weighed.
With the exception of lead and thallium the quantity of metal deposited from an acid solution is always greater than that of the peroxide.
Thallium is a widely-diffused metal, being found in many minerals, particularly in iron- and copper-pyrites and native sulphur.
Thus, the expulsion of two [alpha]-particles from bismuth or one from thallium would yield the required result.
The benzene readily evaporates spontaneously from the methylene iodide, and the water can be driven off from the diluted thallium silver nitrate by boiling.
Retgers of the remarkable properties of thallium silver nitrate, all the known gem stones may be distinguished by a similar process.
Footnote: The part played by resistance is strikingly illustrated by the deportment of silver and thallium when mixed together and volatilised in the arc.
Thallium has experienced a severe depreciation on account of the economical process by which it is extracted from the residue of the lead chambers used in the manufacture of sulphuric acid.
Thallium is a rare metal, found in small quantities in some varieties of iron and copper pyrites, and in some lithia micas.
The iodide curve follows closely that of relative humidity, clouds, and rain; the thallium curve stands in no relation to it.
The author prepares the thallium paper a few days before use, by dipping strips of Swedish filtering paper in a solution of thallous hydrate, and drying.
The thallium papers show that the greatest effect is in the daytime, the iodide papers that it is at night.
Gun-paper' prepared with a very weak solution of chloride or chlorate of thallium shows the characteristic SPRIG-GREEN flame of that metal with great distinctness.
The orange-yellow precipitate formed by mixing a neutral salt of protoxide of thallium with bichromate of potash, is converted by nitric acid into an orange-red.
It is, however, much more readily oxidized than sulphate of lead; and hence the thallium chromates would doubtless soon regain their former hue on exposure to a strong light.
Thallium Orange is produced when bichromate of potash is added to a neutral salt of the protoxide of thallium, as an orange-yellow precipitate.
On chromate of cadmium, made with bichromate of potash, thallium would naturally confer an orange hue.
That thallium affects the colour is most probable, but it is not necessarily the cause of the orange hue.
Let us insert a screen between the lamp and the lime light so as to cut out the latter, and we shall see the bright lines of sodium and thallium reappear as in the upper of the two spectra.
The cooler vapors of sodium and thallium have the power of absorbing exactly those rays from the hotter lime or other similar source which the vapors by themselves would emit to form bright lines.
If we sprinkle thallium salt in the flame the green line of that element will be visible in the spectrum.
The use ofthallium in rodent-control will in some places succeed where strychnine alone fails.
Such limited use of thallium should be guarded with the greatest care under close and fully competent supervision, as it is extremely dangerous to all life.
Though thallium is highly effective in destroying rodents, it can not be overemphasized that this poison is not to be recommended for general use, except to supplement strychnine in follow-up work.
The salts of rubidium, cæsium, and thalliumgive a similar result, but those of sodium and lithium do not.
Thallium discovered by Crookes, and Indium by Reich and Richter.
Curves belonging to this class have been obtained in the case of potassium and thallium nitrates[275] and of naphthalene and monochloracetic acid.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "thallium" in a variety of sentences. We hope that you will now be able to make sentences using this word.
