A treatise on the calculus of variations arranged with the purpose of introducing, as well as illustrating, its principles to the reader by means of problems, and designed to present in all important particulars a complete view of the present state of the science - Carll, Lewis Buffett (Wiley, 1881)
Calculus of variations. -- A digital reproduction made from a copy held by Cornel University is available from the Cornell University Library's Historical Mathematics Monographs Web site.