""Key To The Southworth-Stone Arithmetics: For The Use Of Teachers"" is a book written by Gordon Augustus Southworth in the year 1906. This book serves as a guide to teachers who are using the Southworth-Stone Arithmetics in their classrooms. The Southworth-Stone Arithmetics is a series of textbooks that were widely used in American schools during the early 20th century. The key provides answers to the problems and exercises found in the textbooks,...