Analog Science Fiction - Science Fact September 1970 (Volume 86, Number 1)
Illustrations by Kelly Freas, Leo Summers. Cover by Kelly Freas (for "Lost Newton.")

Novelette: "Lost Newton" by Stanley Schmidt (basis for Newton and the Quasi-Apple.)

Stories: "The Wandering Buoy" by A. Bertram Chandler (a "John Grimes/Rim" story)
"Talk with the Animals" by Stephen Tall
"Top Billing" by Jack Wodhams.

Serial: "Star Light" (conclusion) by Hal Clement (sequel to Mission of Gravity.)

Science: "Nuclear Power" by Edward C. Walterscheid.

John W. Campbell's editorial is "The New Stone Age"; Book reviews by P. Schuyler Miller.