Corrections and Clarifications


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Science  18 May 1990:
Vol. 248, Issue 4957, pp. 802
DOI: 10.1126/science.802-c


In Robert Pool's article "Freshman chemistry was never like this" (News & Comment, 13 Apr., p. 157), the description of physicist Theodore Ducas'teaching at Welleslcy College contained an error. The last sentence of the second paragraph on page 158 should have read, "They [the students] can see for themselves that masses in a gravitational field really do move in a parabola . . . and also that their horizontal [not vertical] velocity remains constant throughout the motion."

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