""An Elementary Treatise On Mensuration"" is a book written by Benjamin Theophilus Moore in 1863. The book is a comprehensive guide to the principles and practices of mensuration, which is the branch of mathematics that deals with the measurement of geometric figures and their properties. The book covers a wide range of topics, including the measurement of length, area, volume, and angles, as well as the use of trigonometry in mensuration. It also...