But the satisfaction was at its height when the crucible produced, after cupellation, a button of.    From Wordnik.com.  [The Land of Midian] Reference

Silver lead alloys, cupellation of, 98 sampling of, 157.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

The cupellation must be made with all the requisite precautions.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

Silver, 87 correction for cupellation loss, 103 detection of, 87.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

In round numbers the cupellation loss of pure gold is .15 per cent.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

~The cupellation temperature for gold~ is an orange-red heat or perhaps.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

The cupellation loss will be five or six per cent. of the silver present.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

The loss in cupellation having been allowed for by any of the usual methods.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

Care must be taken to remove the cupels as soon as cupellation has finished.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

~Effect of Varying Silver. ~ -- 20 grams of lead were used in each cupellation.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

The button of silver got in this second cupellation is added to that first obtained.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

When the cupellation has finished, the button of gold is measured as already described.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

~The proportion of lead required~ for the cupellation of any particular alloy requires consideration.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

But in either case the cupellation is imperfect, and should be repeated with a larger proportion of lead.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

II. weigh 0.1202 and 0.1203, they will have suffered in this second cupellation an average loss of 2.5 milligrams.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

Thirty grams of galena gave on dry assay 21 grams of lead; and this, on cupellation, gave 15 milligrams of silver.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

Buttons solidified in this way are more malleable than when they are withdrawn promptly on the finish of the cupellation.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

These figures are based on those given by Plattner, and apply only to buttons of such shape as those left after cupellation.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

~ -- The silver is best separated in the wet way before cupelling, but if the proportion is not too small, it can be found by cupellation.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

~ -- This assay is made up of two parts: (1) the concentration of the silver in a button of lead; and (2) the cupellation of the resulting alloy.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

For the cupellation of 1 gram of a silver copper alloy containing different percentages of copper, the following quantities of lead should be used.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

As with silver so with gold the predominant cause of the cupellation loss is the solution of the metal in the molten litharge which passes into the cupel.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

In the latter case it is best to scorify the lead down to something less than 1 gram, and to perform the cupellation on a specially prepared small fine cupel.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

On the other hand, as already explained, the cupellation loss on the poorer alloy is as much as, or even more than, with the richer one, because of the copper, &c.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

It combines with silica, forming fluid slags; and at a red heat is liquid enough to be absorbed by a cupel; in fact, bismuth may take the place of lead in cupellation.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

When the cupel shows signs of the presence of these metals in objectionable quantity, it is well to repeat the assay and scorify so as to remove them before cupellation.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

But the cupellation loss is smaller with less gold and greater with more copper, and it so happens in these assays that these two opposites nearly neutralise one another.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

Lead required for cupellation 105.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

Silver lost in cupellation 0.0100 ".    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

Silver lost in cupellation 0.0020 ".    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference

Gold-lead alloys, cupellation of, 142 sampling of, 158.    From Wordnik.com.  [A Text-book of Assaying: For the Use of Those Connected with Mines.] Reference