Philadelphia: W.B.Saunders & Co., 1901. Hard Cover. 12mo. 218pp & 18pp of ads. Green cloth. With 112 colored lithographic figures and 139 other illustrations many of them in colors. Rubbed at spine and edges. Front and back hinge cracked but intact. Bookplate on front free endpaper. good. Item #40892
authorized translation from the second revised german edition.