Announcing an addition to the Informative Reference Series: This book summarizes the origins and development of standards for the control of weights and measures; the importance to the continuance of fair trade among individuals and countries; and describes the equipment used from earliest times to the present. Black and white photographs and engravings illustrate all the instruments mentioned in the text. There is a short section detailing the methods of British governmental control and inspection of scales. In many ways, this system is comparable to that followed in the U.S. This British slant in no way detracts from the book's value as background material in history and science courses. An appendix lists the weights and measures used by the nations of the world, with differences well defined.