NITRE. KJV form of Lye.

International Standard Bible Encyclopedia (1915)

Nitre as used in the [[King James Version]] does not correspond to the present use of that term. Nitre or niter is now applied to sodium or potassium nitrate. The writer has in his collection a specimen of sodium carbonate, called in Arabic naTrun, which was taken from the extensive deposits in Lower Egypt where it is found as a deposit underneath a layer of common salt. Similar deposits are found in Syria and Asia Minor. This is probably the "nitre" of the Bible. the American Standard [[Revised Version]] has rendered niter "lye" in Jer 2:22, and "soda" in Pr 25:20. Soda or lye has been used as a cleansing agent from earliest times. It effervesces energetically, when treated with an acid; hence, the comparison in Pr 25:20 of the heavy-hearted man roiled by the sound of singing to the sizzling of soda on which vinegar has been poured.

See [[Vinegar]].

James A. Patch