He was soon experimenting with different processes—solarization, negative images, multiple exposures—and in 1921 he created the "rayograph." This volume collects together the best of his experimental work, as well as portraits of some of the most important figures in modern art. <br /><strong><br />About the series</strong>: The classic Photofile series brings together the best work of the world's greatest photographers in an attractive format and at a reasonable price. Handsome and collectible, the books are produced to the highest standards. Each volume contains some sixty full-page reproductions printed in superb duotone, together with a critical introduction and a full bibliography. Now back in print, the series was awarded the first annual prize for distinguished photographic books by the International Center of Photography.