British physicist and Egyptologist; he revived the wave theory of light and proposed a three-component theory of color vision; he also played an important role in deciphering the hieroglyphics on the Rosetta Stone (1773-1829)
United States religious leader of the Mormon Church after the assassination of Joseph Smith; he led the Mormon exodus from Illinois to Salt Lake City, Utah (1801-1877)
not tried or tested by experience; "unseasoned artillery volunteers"; "still untested in battle"; "an illustrator untried in mural painting"; "a young hand at plowing"