SG Heritage Dictionary

Trona [Noun] Webster's Dictionary 1913

A native double salt, consisting of a combination of neutral and acid sodium carbonate, Na2CO3.2HNaCO3.2H2O, occurring as a white crystalline fibrous deposit from certain soda brine springs and lakes; -- called also urao, and by the ancients nitrum.

Tronage [Noun] Webster's Dictionary 1828

Formerly, a toll or duty paid for weighing wool.

Tronage [Noun] Webster's Dictionary 1913

A toll or duty paid for weighing wool; also, the act of weighing wool.

Tronator [Noun] Webster's Dictionary 1828

An officer in London, whose business was to weigh wool.

Tronator [Noun] Webster's Dictionary 1913

An officer in London whose duty was to weigh wool.