The word nechosheth is improperly translated by "brass." In most places of the Old Testament the correct translation would be copper, although it may sometimes possibly mean bronze a compound of copper and tin. Indeed a simple metal was obviously intended, as we see from ( 8:9; 33:25; Job 28) Copper was known at a very early period. (Genesis 4:22)
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Bibliography Information Smith, William, Dr. "Entry for 'Brass'". "Smith's Bible Dictionary". <http://classic.studylight.org/dic/sbd/view.cgi?number=T828>. 1901.