Researches in the calculus of variations, principally on the theory of discontinuous solutions an essay to which the Adams prize was awarded in the University of Cambridge in 1871 This book, "Researches in the calculus of variations," by I. Todhunter, is a replication of a book originally published before 1871. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible.