LETTERS AND CORRECTIONS

"The power and the beauty of science do not rest upon infallibility, which it has not, but on corrigibility, without which it is nothing."—Howard E. Gruber* Letters submitted for possible publication must be identified as such, with permission to publish appended as a postscript. Text length must not exceed 400 words. No more than five references may be used; reference format must be that specified in ' Informa-tion for Authors " (page 1-6). All portions of letters must be typed double-spaced, including references. Tables and figures will not be published. Acceptance of letters for publication depends on several factors: newness of information, relevance to current topics and recent content of this journal, clarity of statement, distribution of topics within this section, conformity to acceptable formats, space available. The Editor reserves the right to shorten letters and make changes to our style. Receipt of letters will not be acknowledged. Authors of letters to be published will be notified of their accept-ance. Letters from U. S. correspondents not published will be re-turned if submitted with a stamped, addressed envelope; letters from persons outside the United States will be returned at our ex-pense but without comment