Sand. 1 Cubic Yard of Sand can weigh between 2,600 to 3,000 lbs. or up to one and a half tons approximately. 1 Ton of Sand will cover between 80 to 100 square feet at a 2 inch depth approximately.
Tellurium was discovered by Franz Joseph Muller von Reichstein in 1783 at Romania. Origin of name: from the Latin word  tellus  meaning  earth . Tellurium was discovered in gold ores by Franz Joseph MÎ´ller von Reichenstein, the chief inspector of mines in Trannsylvania in 1782.However tellurium was named by M. Klaproth, who isolated it in 1798, after he continued MÎ´ller von Reichenstein's work.ellurium was discovered in gold ores by Franz Joseph MÎ´ller von Reichenstein, the chief inspector of mines in Trannsylvania in 1782. However tellurium was named by M. Klaproth, who isolated it in 1798, after he continued MÎ´ller von Reichenstein's work.
Linguistically, Tel(l) is Semitic. The Sumerian term was dul and was used in Old Akkadian in the 24th-23rd century B.C. to refer to the ruins of a city. The plural used for tell is tilli, which seems literally to mean hillocks.