SIR JOHN HERSCHEL

SIR JOHN HERSCHEL (1790-1871), astronomer, only son of Sir William; prosecuted with great diligence and success the same researches as his father; spent four years at the Cape, and added much to our knowledge of the stars and meteorology; contributed a "Preliminary Discourse on the Study of Natural Philosophy" to Lardner's "Cyclopædia," and an excellent "Treatise on Astronomy," afterwards extended.