When was John Slater elder brother born?
John Slater (industrialist) John Slater (December 25, 1776–1843) was an early American industrialist, founder of Slatersville, Rhode Island and younger brother of Samuel Slater, father of the American Industrial Revolution, and a member of the well-known Slater family.
John J. Slater, Jr. John J. Slater, Jr. was an American lawyer and politician who served as mayor of Chelsea, Massachusetts and as a member of the Massachusetts House of Representatives.