Boston: American Metric Bureau 1877. Fourth Edition. 64,  pp. plus large foldout in rear (torn, dampstained). 4-1/4" x 6-1/4 inches. Cloths spine over printed paper boards. Dampstained throughout. Hinges with mesh showing but still holding. Front board duplicates title page (rubbed). Rear cover with printed Metric equivalents (well rubbed). Sticker mark on front flyleaf. fair. Boards. 
A textbook of the metric system of weights and measures with exercises and answers for students .