Those principles included modern theories of atomic and molecular structure, quantum mechanics, statistical mechanics and thermodynamics. In addition, Dr. Pauling attempted to correlate the theories with descriptive chemistry, the observed properties of substances, to introduce the student to the multitude of chemical substances and their properties.In this extensively revised and updated third edition, the Nobel prizewinning author maintains an excellent balance between theoretical and descriptive material, although the amount of descriptive chemistry has been decreased somewhat, and the presentation of the subject, especially in relation to the nonmetals, has been revised in such a way as to permit greater correlation with the electronic structure of atoms, especially electronegativity. The principles of quantum mechanics are discussed on the basis of the de Broglie wavelength of the electron. The quantized energy levels of a particle in a box are derived by means of a simple assumption about the relation of the de Broglie waves to the walls of the box. No attempt is made to solve the Schrödinger wave equation for other systems, but the wave functions of hydrogen-like electrons are presented and discussed in some detail, and the quantum states for other systems are also covered. Statistical mechanics is introduced before thermodynamics, and the discussion of thermodynamics is based on it. This arrangement reflects the author's belief that beginning students can understand statistical mechanics better than chemical thermodynamics. Aimed at first-year college students who plan to major in chemistry or closely related fields, the book is written in a logical, clear and understandable style. In addition, many excellent figures are included, along with numerous problems and 75 pages of appendixes covering such topics as symmetry of molecules and crystals, hybrid bond orbitals, and magnetic properties of substances.

    This book explores love, sex, and life, from the asexual point of view. This book is for anyone, regardless of orientation. Whether you're asexual, think you might be, know someone who is, or just want to learn more about what asexuality is (and isn't), there's something inside for you. This is one of the first books exclusively dedicated to the subject of asexuality as a sexual orientation. Written by an asexual, it discusses the topic from the inside.

    In defiance of doomsayers, Johnson finds librarians more vital and necessary than ever, as they fuse the tools of the digital age with love for the written word and the enduring values of truth, service to all, and free speech. This Book Is Overdue! is a romp through the ranks of information professionals who organize our messy world and offer old-fashioned human help through the maze.

    It is also the best route to enjoying the landscape of Great Britain. Within these pages Vicki Pipe and Geoff Marshall from All the Stations (YouTube transport experts and survivors of a crowd-funded trip to visit all the stations in the UK) help you discover the hidden stories that lie behind branch lines, as well as meeting the people who fix the engines and put the trains to bed. Embark on unknown routes, disembark at unfamiliar stations, explore new places and get to know the communities who keep small stations and remote lines alive.

    You can crochet these slippers in about 2 hours dependingon how fast you crochet using bulky yarn and a J, K, or L hook.The pattern instructions are for 4 styles of ladies slippers in three sizes. Patterns for threeflower embellishments and 2 bows are included.This crochet pattern is suitable for beginners.You should know how to chain, single crochet,half double crochet, double crochet, and sew seams together with yarn. Ariana - These slippers are so soft and comfortable with just the right amount of stretch. You can crochet these in less than 2 hours and they make great gifts. Carrie - Super simple to make, these soft and cozy slippers are just right for lounging around. Flora - A pretty pair of slippers that fit your feet quite cozily! Isabell -This pretty ballerina style slipper can be made in two colors or just use one. I hope you enjoy my patterns for these easy to crochet slippers.

    How did the table fork acquire a fourth tine?  What advantage does the Phillips-head screw have over its single-grooved predecessor? Why does the paper clip look the way it does? What makes Scotch tape Scotch?   In this delightful book Henry Petroski takes a microscopic look at artifacts that most of us count on but rarely contemplate, including such icons of the everyday as pins, Post-its, and fast-food "clamshell" containers.  At the same time, he offers a convincing new theory of technological innovation as a response to the perceived failures of existing products—suggesting that irritation, and not necessity, is the mother of invention.

    Explaining the truth behind the screening statistics and investigating the evidence behind the hype, Margaret McCartney, an award-winning writer and doctor, argues that this patient paradox - too much testing of well people and not enough care for the sick - worsens health inequalities and drains professionalism.

    Presented in an eye-popping package and filled with hyperdetailed photography of individual buds, this essential guide to marijuana is smart, practical, and exceedingly beautiful. The "Primer" section explores the culture of this complex flower and explains the botany that makes each strain unique. The "Buds" section describes the variations of lineage, flavor, and mental or physical high that define 170 exceptional strains. Poised to become the go-to marijuana guide for recreational and medicinal users alike, Green is easy to pick up and impossible to put down.

    In all the current highly publicized debates about creationism and its descendant "intelligent design," there is an element of the controversy that is rarely mentioned—the "evidence," the empirical truth of evolution by natural selection. Even Richard Dawkins and Stephen Jay Gould, while extolling the beauty of evolution and examining case studies, have not focused on the evidence itself. Yet the proof is vast, varied, and magnificent, drawn from many different fields of science. Scientists are observing species splitting into two and are finding more and more fossils capturing change in the past—dinosaurs that have sprouted feathers, fish that have grown limbs. Why Evolution Is True weaves together the many threads of modern work in genetics, paleontology, geology, molecular biology, and anatomy that demonstrate the "indelible stamp" of the processes first proposed by Darwin. In crisp, lucid prose accessible to a wide audience, Why Evolution Is True dispels common misunderstandings and fears about evolution and clearly confirms that this amazing process of change has been firmly established as a scientific truth.

    This book can be cut, drawn in, folded into shapes and will even take you to the fourth dimension. So join stand-up mathematician Matt Parker on a journey through narcissistic numbers, optimal dating algorithms, at least two different kinds of infinity and more.

    Callahan, whose popular Good House Book helped environmentally-minded readers create an earth-friendly home, have returned with a photo-packed, amazingly complete, start-to-finish guide to "green" housebuilding.This absolutely groundbreaking manual doesn't just talk about eco-friendly building techniques, but actually shows every step! More than 1,200 close-up photographs, along with in-depth descriptions, follow the real construction of an alternative house from site selection to the addition of final-touch interior details. Co-authors Clarke Snell and Timothy Callahan (a professional builder and contractor) provide thorough discussions of the fundamental concepts of construction, substitutes for conventional approaches, and planning a home that's not only comfortable and beautiful, but environmentally responsible. Then, they roll up their sleeves and get to work assembling a guest house that incorporates four different alternative building methods: straw bale, cob, cordwood, and modified stick frame. The images show every move: how the site is cleared, the basic structure put together, the cob wall sculpted, the bales and cordwood stacked, a living roof created, and more. Most important, the manual conveys real-world challenges and processes, and offers dozens of sidebars with invaluable advice. It's head and shoulders above all others in the field.

    John's, Antigua; Oranjestad, Aruba; Bridgetown, Barbados; Belize City, Belize; Bermuda; Kralendijk, Bonaire; Calica (Playa del Carmen), Mexico; Cartagena, Colombia; Colon, Panama; Costa Maya, Mexico; Willemstad, Curacao; Roseau, Dominica; Falmouth, Jamaica; Freeport-Lucaya, Bahamas; Grand Cayman, Cayman Islands; Grand Turk, Turks and Caicos Islands; St. George's, Grenada; Pointe-a-Pitre, Guadeloupe; Key West, Florida; La Romana, Dominican Republic; Fort-de-France, Martinique; Montego Bay, Jamaica; Nassau, Bahamas; Charlestown, Nevis; Ocho Rios, Jamaica; Progreso, Mexico; Puerto Limon, Costa Rica; Roatan, Honduras; Samana (Cayo Levantado), Dominican Republic; San Juan, Puerto Rico; Santo Domingo, Domican Republic; Santo Tomas de Castilla, Guatemala; Gustavia, St. Barthelemy; Fredericksted, St. Croix; Cruz Bay, St. John; Basseterre, St. Kitts; Castries, St. Lucia; Philipsburg, St. Maarten; Charlotte Amalie, St. Thomas; Kingstown, St. Vincent; Road Town, Tortola; and The Valley, Virgin Gorda· Covered ports of embarkation: Baltimore, Maryland; Charleston, South Carolina; Fort Lauderdale, Florida; Galveston, Texas; Houston, Texas; Jacksonville, Florida; Miami, Florida; New Orleans, Louisiana; New York, New York; Port Canaveral, Florida; San Juan, Puerto Rico; Tampa, Florida

    Nobody is perfect. And that includes five of the greatest scientists in history—Charles Darwin, William Thomson (Lord Kelvin), Linus Pauling, Fred Hoyle, and Albert Einstein. But the mistakes that these great luminaries made helped advance science. Indeed, as Mario Livio explains, science thrives on error, advancing when erroneous ideas are disproven.As a young scientist, Einstein tried to conceive of a way to describe the evolution of the universe at large, based on General Relativity—his theory of space, time, and gravity. Unfortunately he fell victim to a misguided notion of aesthetic simplicity. Fred Hoyle was an eminent astrophysicist who ridiculed an emerging theory about the origin of the universe that he dismissively called “The Big Bang.” The name stuck, but Hoyle was dead wrong in his opposition.They, along with Darwin (a blunder in his theory of Natural Selection), Kelvin (a blunder in his calculation of the age of the earth), and Pauling (a blunder in his model for the structure of the DNA molecule), were brilliant men and fascinating human beings. Their blunders were a necessary part of the scientific process. Collectively they helped to dramatically further our knowledge of the evolution of life, the Earth, and the universe.

    Examples of analytical techniques are drawn from such areas as life sciences, clinical chemistry, air and water pollution, and industrial analyses. New to this edition: Excel spreadsheets on CD-ROM * New chapters on good laboratory practice, as well as genomics and proteomics * A more modern flavor.

    Field journalist Richard Conniff examines the lives of two-, four-, six-, and eight-legged creatures from around the globe, providing adventure-packed accounts of his many ill advised forays into the animal kingdom. He pulls a 90-pound snapping turtle out of a Louisiana bayou, tracks leopards with !Kung San hunters in the Namibian desert, and travels through the Himalayas in pursuit of tigers and the mythical migur. All in a day’s work, he flings chicken carcasses into piranha-infested waters to clock how quickly they disappear before diving in himself, and then encounters a man stung by 120 different species of insects, ranking their pain the way Robert Parker ranks wine. Again and again, Conniff courts the most dangerous animals and lives to tell the tale. This collection offers a rare chance to accompany him on death defying treks and see life through the lens of a bona-fide field naturalist. .