The Elements of Materia Medica and Therapeutics: Second London Edition, First American Edition Two-volume book, "The Elements of Materia Medica and Therapeutics," second London edition and first American edition, published by Lea & Blanchard in Philadelphia. Volume I contains 714 pages, 16 pages of advertisements, 100 wood cuts, and xliv preface pages. Volume II contains 852 pages. Published in the USA in the 1860s. Authored by Jonathan Pereira, M.D. (1804-1853).