MAXWELL'S DEMON

WHY WARMTH DISPERSES AND TIME PASSES

Von Baeyer (Physics/Coll. of William and Mary) offers assorted views of the —demon— and how he’s been slain over time to preserve the sacred second law of thermodynamics. The second law asserts that the universe is moving toward disorder and an increase in entropy. Given enough time, the universe will achieve a state of thermal equilibrium that has been poetically described as heat death. Practically speaking, the second law says that your cup of coffee always cools, that you can’t go backward in time, and that there is no free lunch as far as energy is concerned. That’s where Maxwell’s demon comes in. The eminent James Clerk Maxwell devised a thought experiment in which a tiny (and clever) demon sat at a trap door between two chambers, each filled with gas at different temperatures. Within each chamber, the molecules moved at various speeds in random directions. Suppose the microscopic demon selected the fastest molecules from the cooler chamber and opened the door to admit them to the warmer chamber, never allowing molecules from the hotter chamber to gain access to the cooler? The hotter chamber gets even hotter, with little or no energy expended—a violation of the second law! But, it turns out, this and other variants on the ways a demon could sort molecules didn—t allow for Brownian motion, in which a “large” object (the trap door) bombarded by molecules starts jiggling and destroying the purposeful activities of the demon. To properly appreciate the cogency of that argument, von Baeyer’s reader is treated to a detailed survey of 19th- and 20th-century physics: The conservation of energy, the concept of atoms, probability theory, and much more. To his credit, von Baeyer, a National Magazine Award winner, is ever a graceful and witty writer, at pains to clarify concepts. But this is challenging stuff. Readers are advised to follow Feynman’s principle: Read until you don’t understand, then go back and reread.

Pub Date: July 1, 1998

ISBN: 0-679-43342-2

Page Count: 256

Publisher: Random House

Review Posted Online: May 20, 2010

Kirkus Reviews Issue: June 1, 1998

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Not only the definitive life, but a tour de force by a master.

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EDISON

One of history’s most prolific inventors receives his due from one of the world’s greatest biographers.

Pulitzer and National Book Award winner Morris (This Living Hand and Other Essays, 2012, etc.), who died this year, agrees that Thomas Edison (1847-1931) almost certainly said, “genius is one percent inspiration and ninety-nine percent perspiration,” and few readers of this outstanding biography will doubt that he was the quintessential workaholic. Raised in a middle-class Michigan family, Edison displayed an obsessive entrepreneurial spirit from childhood. As an adolescent, he ran a thriving business selling food and newspapers on a local railroad. Learning Morse code, he spent the Civil War as a telegrapher, impressing colleagues with his speed and superiors with his ability to improve the equipment. In 1870, he opened his own shop to produce inventions to order. By 1876, he had money to build a large laboratory in New Jersey, possibly the world’s first industrial research facility. Never a loner, Edison hired talented people to assist him. The dazzling results included the first commercially successful light bulb for which, Morris reminds readers, he invented the entire system: dynamo, wires, transformers, connections, and switches. Critics proclaim that Edison’s innovations (motion pictures, fluoroscope, rechargeable batteries, mimeograph, etc.) were merely improvements on others’ work, but this is mostly a matter of sour grapes. Alexander Graham Bell’s telephone was a clunky, short-range device until it added Edison’s carbon microphone. And his phonograph flabbergasted everyone. Humans had been making images long before Daguerre, but no one had ever reproduced sound. Morris rivetingly describes the personalities, business details, and practical uses of Edison’s inventions as well as the massive technical details of years of research and trial and error for both his triumphs and his failures. For no obvious reason, the author writes in reverse chronological order, beginning in 1920, with each of the seven following chapters backtracking a decade. It may not satisfy all readers, but it works.

Not only the definitive life, but a tour de force by a master.

Pub Date: Oct. 22, 2019

ISBN: 978-0-8129-9311-0

Page Count: 800

Publisher: Random House

Review Posted Online: July 15, 2019

Kirkus Reviews Issue: Aug. 1, 2019

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Jahren transcends both memoir and science writing in this literary fusion of both genres.

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LAB GIRL

Award-winning scientist Jahren (Geology and Geophysics/Univ. of Hawaii) delivers a personal memoir and a paean to the natural world.

The author’s father was a physics and earth science teacher who encouraged her play in the laboratory, and her mother was a student of English literature who nurtured her love of reading. Both of these early influences engrossingly combine in this adroit story of a dedication to science. Jahren’s journey from struggling student to struggling scientist has the narrative tension of a novel and characters she imbues with real depth. The heroes in this tale are the plants that the author studies, and throughout, she employs her facility with words to engage her readers. We learn much along the way—e.g., how the willow tree clones itself, the courage of a seed’s first root, the symbiotic relationship between trees and fungi, and the airborne signals used by trees in their ongoing war against insects. Trees are of key interest to Jahren, and at times she waxes poetic: “Each beginning is the end of a waiting. We are each given exactly one chance to be. Each of us is both impossible and inevitable. Every replete tree was first a seed that waited.” The author draws many parallels between her subjects and herself. This is her story, after all, and we are engaged beyond expectation as she relates her struggle in building and running laboratory after laboratory at the universities that have employed her. Present throughout is her lab partner, a disaffected genius named Bill, whom she recruited when she was a graduate student at Berkeley and with whom she’s worked ever since. The author’s tenacity, hope, and gratitude are all evident as she and Bill chase the sweetness of discovery in the face of the harsh economic realities of the research scientist.

Jahren transcends both memoir and science writing in this literary fusion of both genres.

Pub Date: April 5, 2016

ISBN: 978-1-101-87493-6

Page Count: 336

Publisher: Knopf

Review Posted Online: Jan. 5, 2016

Kirkus Reviews Issue: Jan. 15, 2016

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