Noun:

கிராபைட் என்னும் தாதுப் பொருள்,

plumbago's Usage Examples:

Formerly bullion was melted in crucibles made of refractory clay, but they are liable to crack and require careful handling These were succeeded by iron crucibles, especially for melting silver, and these have now been generally replaced by graphite (plumbago) crucibles made of a mixture of clay and graphite.

He sometimes held the carbon powder against the diaphragm in a small tr ans' shallow cell (from a quarter to half an inch in diameter and about an eighth of an inch deep), and sometimes he used what he describes as a fluff, that is, a little brush of silk fibre with plumbago rubbed into it.

In 1778 he proposed a new method of making calomel and powder of algaroth, and he got molybdic acid from mineral molybdaena nitens which he carefully distinguished from ordinary molybdena (plumbago or black lead of commerce).

In another form the plumbago powder was worked into a button cemented together with syrup and other substances.

The mould is in two, pieces hinged together; it is heated and the inner surface is rubbed over with finely powdered plumbago.

In the following year he showed that plumbago consists essentially of carbon, and he published a record of estimations of the proportions of oxygen in the atmosphere, which he had carried on daily during the whole of 1778 - three years before Cavendish.

Plumbago capensis (cape plumbago capensis (cape plumbago) scrambles in warm stony walls, with its flowers obscuring all foliage.

plumbago, and molybdenite and copper possess similar powers, and can be used as detectors in radio-telegraphy.

In small works the cupellation is finished in one furnace, and the resulting low-grade silver fined in a plumbago crucible, either by overheating in the presence of air, or by the addition of silver sulphate to the melted silver, when air or sulphur trioxide and oxygen oxidize the impurities.

Minerals produced in small quantities include gypsum, millstones, salt and sandstone, and among those found but not produced (in 1902) in commercial quantities may be mentioned allanite, alum, arsenic, bismuth, carbonite, felspar, kaolin, marble, plumbago, quartz, serpentine and tin.

Before it can be cupelled it has to be freed from most of the zinc, which is accomplished by distilling in a retort made of a mixture similar to that of the plumbago crucible.

Synonyms:

genus Plumbago, herb, herbaceous plant,

Antonyms:

deficit, disadvantage, follow, stay in place,