Crossword-Solution: TRONA 5 letters, 21 clues 🏆 scrabble score: 5

The 'Natron' is collected once a year, and is used both in Egypt and Syria, as also in Europe, for manufacturing glass and soap, and for bleaching linen." Turning to "Sodium" for the sesquicarbonate, which is found native in Hungary, and also near Fezzan, in Africa: 'By the natives it is called "Trona." It is found in hard striated crystalline masses, and is not altered by exposure to the air, but is readily soluble in water.

Gouro nuts are chewed, and sometimes even swallowed when mixed with _trona_, a habit not peculiar to Houssa, for it extends to Bornou, where it is strictly forbidden to women.

Here a small Kafflé passed us, consisting of ten or twelve camels, and amongst them one or two Maherries, laden with Trona, or soda, الطرون from Fezzan.

Soda, called Trona الطرون, rock salt, alum, Shub شب, gypsum, saltpetre, and, as I was told, sulphur, are found in this country; the first three in very large quantities, which form articles of trade.

Down the former, on the way to Ejido, about seven miles from the capital, the road passes all the way through coffee and cacao plantations, with some open pasture-lands; beyond Ejido the valley becomes more and more barren towards Lagunillas, famed for its mineral lake, containing large quantities of _urao_ or trona.