The Operative Mechanic, And British Machinist; Being a Practical Display of the Manufactories And Mechanical Arts of the United Kingdom 2
The Operative Mechanic, And British Machinist; Being a Practical Display of the Manufactories And Mechanical Arts of the United Kingdom 2
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of zinc.
Usrful alloy cf gold ivith plaMnum.
7i dr. pure goU, and t i dr. platinum.
The platinum must be added when the gold is perfbctly melted. The two metals will combine intimately^ forming an alloy rather whiter than p«re gold) but reiftarkably ductile and elastic; it is also less 280 APPBNDIX.
perishable than pure gDld, or jetrellet's gold: but more readily fusi- ble than that metal.
These excellent qualities must render this alloy an object of great interest to workers in metols. For spr...ings where steel cannot be used, it will prove exceedingly advantageous.
It is a curious circumstance, that the alloy of gold sloA platinum is soluble in nitric acid, which does not act on either of the metals in a sepa- rate state. It is rernvrkablet too, that the alloy has very nearly the co- lour of platinum, even when composed of eleven parts of gold to one of the former metal.
Ring-gold. 6 d>vts. 12 gi^. Spanish copper, 3 dwts. 16 grs. fine silver, and 1 oz. 5 dwts. gold coiQ.
Gold from 355.
What to read after The Operative Mechanic, And British Machinist; Being a Practical Display of the Manufactories And Mechanical Arts of the United Kingdom 2?
You can find similar books in the "Read Also" column, or choose other free books by Nicholson, John, 1765-1820 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
of zinc.
Usrful alloy cf gold ivith plaMnum.
7i dr. pure goU, and t i dr. platinum.
The platinum must be added when the gold is perfbctly melted. The two metals will combine intimately^ forming an alloy rather whiter than p«re gold) but reiftarkably ductile and elastic; it is also less 280 APPBNDIX.
perishable than pure gDld, or jetrellet's gold: but more readily fusi- ble than that metal.
These excellent qualities must render this alloy an object of great interest to workers in metols. For spr...ings where steel cannot be used, it will prove exceedingly advantageous.
It is a curious circumstance, that the alloy of gold sloA platinum is soluble in nitric acid, which does not act on either of the metals in a sepa- rate state. It is rernvrkablet too, that the alloy has very nearly the co- lour of platinum, even when composed of eleven parts of gold to one of the former metal.
Ring-gold. 6 d>vts. 12 gi^. Spanish copper, 3 dwts. 16 grs. fine silver, and 1 oz. 5 dwts. gold coiQ.
Gold from 355.
What to read after The Operative Mechanic, And British Machinist; Being a Practical Display of the Manufactories And Mechanical Arts of the United Kingdom 2?
You can find similar books in the "Read Also" column, or choose other free books by Nicholson, John, 1765-1820 to read onlineMoreLess
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