Why should there be a handbook of sensory physiology, and if so, why now' The editors have asked this question, marshalled all of the arguments that seemed to speak against their project, and then discovered that most of these arguments really spoke in favor of it: there seemed to be no doubt that the attempt should be made and that it should be made now. No complete overview of sensory physiology has been attempted since Bethe's "Handbuch der normalen und pathologischen Physiologie," nearly forty years ago. Since then, the field has evolved with unforeseen rapidity. Although electric probing of single peripheral nerve fibers was begun by ADRIAN and ZOTTERMAN as early as 1926, in the somatosensory system, and extended to single optic nerve fibers by HARTLINE in 1932, the real upsurge of such single-unit studies has only come during the last two decades. Single-cell electrophysiology has now been applied to all sensory modalities and on almost every conceivable phylogenetic level. It has begun to clarify peripheral receptor action and is adding to our. understanding of the central processing of sensory information. In parallel with these developments, there have been fundamental studies of the physics and chemistry of the receptors themselves: these studies are leading to insights into the mechanisms of energy transduction and nerve impulse initiation.

No one can escape a sense of wonder when looking at an organism from within. From the humblest amoeba to man, from the smallest cell organelle to the amazing human brain, life presents us with example after example of highly ordered cellular matter, precisely organized and shaped to perform coordinated functions. But where does this order spring from? How does a living organism manage to do what nonliving things cannot do--bring forth and maintain all that order against the unrelenting, disordering pressures of the universe?

In The Touchstone of Life, world-renowned biophysicist Werner Loewenstein seeks answers to these ancient riddles by applying information theory to recent discoveries in molecular biology. Taking us into a fascinating microscopic world, he lays bare an all-pervading communication network inside and between our cells--a web of extraordinary beauty, where molecular information flows in gracefully interlaced circles. Loewenstein then takes us on an exhilarating journey along that web and we meet its leading actors, the macromolecules, and see how they extract order out of the erratic quantum world; and through the powerful lens of information theory, we are let in on their trick, the most dazzling of magician's acts, whereby they steal form out of formlessness.

The Touchstone of Life flashes with fresh insights into the mystery of life. Boldly straddling the line between biology and physics, the book offers a breathtaking view of that hidden world where molecular information turns the wheels of life. Loewenstein makes these complex scientific subjects lucid and fascinating, as he sheds light on the most fundamental aspects of our existence.