Lectures On The Principles Of Demonstrative Mathematics is a book written by Philip Kelland and originally published in 1843. The book is a comprehensive guide to the principles of mathematics and is intended for students and scholars of the subject. The book covers a wide range of topics, including algebra, geometry, calculus, and trigonometry, and provides a detailed explanation of each topic. The book is divided into several sections, each of which covers a specific area of mathematics. The first section covers algebra, including the basic principles of equations, polynomials, and logarithms. The second section covers geometry, including the principles of lines, angles, and circles. The third section covers calculus, including the principles of differentiation and integration. The final section covers trigonometry, including the principles of triangles and trigonometric functions. Throughout the book, Kelland provides numerous examples and exercises to help readers understand the principles of mathematics. The book is written in a clear and concise style, making it accessible to readers of all levels of mathematical knowledge. Overall, Lectures On The Principles Of Demonstrative Mathematics is an essential guide for anyone who is interested in the principles of mathematics and wants to deepen their understanding of the subject.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.