Building Materials
The process of manufacturing steel by heating short lengths of wrought iron bars mixed with charcoal in fire clay crucibles and collecting the molten iron into moulds, is known as

Open hearth process
Crucible process
Bessemer process
Cementation process

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Building Materials
Putty is

Used for fixing glass panes
Softened by a solution of pearl ash and quick-lime soaked in water
All listed here
Made with finely powdered chalk and linseed oil

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