A Letter From The Publisher, Feb. 3, 1958

WHEN scientists, a cautious lot, are on the frontier of knowledge, they are fond of the word "perhaps." At Los Alamos Scientific Laboratory they like the word so much that they named one of their most exciting machines the Perhapsatron S-3. Perhaps the Perhapsatron and its descendants will win from the world's oceans enough energy to fill man's electric power needs for as long as the solar system exists. For the latest steps in taming the H-bomb for peacetime power, see SCIENCE, Toward H-Power.

THE cover subject of TIME'S fourth issue, back in 1923,...

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