Many of the earliest books, particularly those dating back to the 1900s and before, are now extremely scarce and increasingly expensive. We are republishing these classic works in affordable, high quality, modern editions, using the original text and artwork.

An Introduction to Differential Geometry - With the Use of Tensor Calculus

Science & Math

Eisenhart, Luther Pfahler

Mathematics

Maugham Press

This is the third volume in the “tales” section of "The Complete Works Of Edgar Allan Poe". The stories of this volume include: “Narrative of A. Gordon Pym”, “Ligeia”, “How to Write a Blackwood Article”, “A Predicament”, “Silence: A Fable”, “The Devil in the Belfry”, “The Man That Was Used Up”, “The Fall of the House of Usher”, and “William Wilson”. This book constitutes a must have for those with a penchant for the macabre, and it is not to be missed by fans and collectors of Poe’s seminal work. Edgar Allan Poe (1809 - 1849) was a seminal American author, editor, poet, and critic. Poe is famous for his stories of mystery and horror, and was one of the first American short-story writers. He is also considered to be the inventor of the detective fiction genre. Many vintage texts such as this are increasingly scarce and expensive, and it is with this in mind that we are republishing this book now, in an affordable, high-quality, modern edition. It comes complete with a specially commissioned biography of the author.

The Complete Works of Edgar Allan Poe; Tales - Volume 3

Literature & Fiction

POE, EDGAR ALLAN

Literary

AN INTRODUCTION TO DIFFERENTIAL GEOMETRY WITH USE OF THE TENSOR CALCULUS By LUTHER PFAHLER EISENHART. Preface: Since 1909, when my Differential Geometry of Curves and Surfaces was published, the tensor calculus, which had previously been invented by Ricci, was adopted by Einstein in his General Theory of Relativity, and has been developed further in the study of Riemannian Geometry and various generalizations of the latter. In the present book the tensor calculus of cuclidean 3-space is developed and then generalized so as to apply to a Riemannian space of any number of dimensions. The tensor calculus as here developed is applied in Chapters III and IV to the study of differential geometry of surfaces in 3-space, the material treated being equivalent to what appears in general in the first eight chapters of my former book with such additions as follow from the introduction of the concept of parallelism of Levi-Civita and the content of the tensor calculus. LUTHER PFAHLER EISENHART. Contents include: CHAPTER I CURVES IN SPACE SECTION PAGE 1. Curves ami surfaces. The summation convention 1 2. Length of a curve. Linear element , 8 3. Tangent to a curve. Order of contact. Osculating plane 11 4. Curvature. Principal normal. Circle of curvature 16 5. TBi normal. Torsion 19 6r The Frenet Formulas. The form of a curve in the neighborhood of a point 25 7. Intrinsic equations of a curve 31 8. Involutes and evolutes of a curve 34 9. The tangent surface of a curve. The polar surface. Osculating sphere. . 38 10. Parametric equations of a surface. Coordinates and coordinate curves trT a surface 44 11. 1 Tangent plane to a surface 50 tSffDovelopable surfaces. Envelope of a one-parameter family of surfaces. . 53 CHAPTER II TRANSFORMATION OF COORDINATES. TENSOR CALCULUS 13. Transformation of coordinates. Curvilinear coordinates 63 14. The fundamental quadratic form of space 70 15. Contravariant vectors. Scalars 74 16. Length of a contravariant vector. Angle between two vectors 80 17. Covariant vectors. Contravariant and covariant components of a vector 83 18. Tensors. Symmetric and skew symmetric tensors 89 19. Addition, subtraction and multiplication of tensors. Contraction.... 94 20. The Christoffel symbols. The Riemann tensor 98 21. The Frenet formulas in general coordinates 103 22. Covariant differentiation 107 23. Systems of partial differential equations of the first order. Mixed systems 114 CHAPTER III INTRINSIC GEOMETRY OF A SURFACE 24. Linear element of a surface. First fundamental quadratic form of a surface. Vectors in a surface 123 25. Angle of two intersecting curves in a surface. Element of area 129 26. Families of curves in a surface. Principal directions 138 27. The intrinsic geometry of a surface. Isometric surfaces 146 28. The Christoffel symbols for a surface. The Riemannian curvature tensor. The Gaussian curvature of a surface 149 29. Differential parameters 155 30. Isometric orthogonal nets. Isometric coordinates 161 31...

The Life And Times Of St. Anselm - Archbishop Of Canterbury And Primate Of The Britains - Vol 1

Rule, Martin

History

A History Of The Theory Of Elasticity And Of The Strength Of Materials - From Galilei To The Present Time.

Todhunter, Isaac

This vintage book is a detailed treatise on the healing and "magical" properties of stones, gems, crystals, and jewellery. "The Magic Of Jewels And Charms" will appeal to those with an interest in contemporary ideas of crystal healing and gemmology, and it is not to be missed by collectors of vintage literature of this ilk. Contents include: "Magic Stones and Electric Gems", "On Meteorites, or Celestial Stones", "Stones of Healing", "On the Virtues of Fabulous Stones, Concretions and Fossils", "Snake Stones and Bezoars", "Angels and Ministers of Grace", "On the Religious Use of Various Stones", "Amulets: Ancient, Medieval, and Oriental", "Amulets of Primitive Peoples and of Modern Times", and "Fact and Fancies about Precious Stones". Many vintage books such as this are increasingly scarce and expensive. It is with this in mind that we are republishing this volume now in an affordable, modern edition complete with a specially commissioned new introduction. First published in 1915.

The Magic of Jewels and Charms

KUNZ, George Frederick

Many of the earliest books, particularly those dating back to the 1900s and before, are now extremely scarce and increasingly expensive. We are republishing these classic works in affordable, high quality, modern editions, using the original text and artwork.

Analogies and Contrasts - Or, Comparative Sketches of France and England in Two Volumes - Vol. I

Henningsen, Charles Frederick

Europe

Light and Shade With Chapters on Charcoal, Pencil, and Brush Drawing; a Manual for Teachers and Students

Light and Shade with Chapters on Charcoal, Pencil, and Brush Drawing; A Manual for Teachers and Students

Cross, Anson Kent

This text constitutes a complete manual for the farmer, concentrating on the topic of the mechanisation of the farming process. It covers a wide field in a practical manner, and explains in simple language the intricacies and functions of the many types of agricultural machinery, including the internal combustion engine. Although old, much of the information contained herein will still be of much value to the farmer, making this text a worthy addition to collections of farming literature. The chapters of this book include: 'Why Mechanise a Farm?', 'The Internal Combustion Engine', 'The Transmission System', 'The Right Tractor for the Job', 'Horticultural Cultivations', 'Spraying', 'The Tractor at Work – Ploughing', 'The Tractor at Work – Row-Crop Cultivation', 'The Tractor at Work – Implement Operation', 'The Power Lift and its Implements', etcetera. We are proud to republish this vintage text, complete with a new introduction on farming.

Mechanised Farming - A Complete Handbook for the Modern Farmer

Engineering & Transportation

Turner, James

Engineering

This book comprises a collection of articles on the different breeds of pigs, including information on the Berkshire, the Cheshire, The Jersey Red, and many other varieties of swine common to the farm. Also included in these articles is a wealth of other information pertaining to pig farming, such as: feeding, breeding, housing, marketing, etc. These articles will be of considerable value to the modern pig farmer, and make for a great addition to collections of farming and animal-keeping literature. The articles of this book include: 'A Manual on the Hog'; 'Agricultural Experiment Station - Market Classes and Grades of Swine'; 'Bacon Hog and Hog Grading'; 'Biggle Swine Book - Much Old and More New Hog Knowledge, Arranged in Alternative Streaks of Fat and Lean'; 'Good Pig Keeping'; and many more. We are proud to republish these antiquarian articles, now complete with a new introduction on pig farming.

Pig Breeds and Their Characteristics - A Collection of Articles on Berkshires, the Cheshire, Jersey Reds and Many Other Varieties of Swine

VARIOUS

Biological Sciences

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