Only those local residents "with exceptionally good eyesight" will be able to take note of the one percent eclipse appearing to Fred L. Whipple, associate professor of Astronomy.

Even though almost half of California's most valuable property, the sun, will be covered Whipple said last night that the Observatory was not providing for any data-collection even there, because of the predicted ring shape of the corona preventing good photography.

Rumford Professor of Physics Emery L. Chaffee, however, did not regard the silver of sun that the moon will efface here between 3:30 and 4 o"clock so cavalierly last night. He and his associates Harry R. Mimno, Gorden McKay Professor of Applied Physics, and John A. Pierce, research fellow in Electronics, are highly interested in the effects of the phenomenon of radiation.

Recorders on Job

"Our recorders will be going continuously," said Chaffee, "and we will be receiving reports from stations in North Carolina."

Eclipses Chaffee elaborated, produce a rapid sunrise-sunset recording on his devices, received from an elevated position. From his sensitive observations he will be able to detect differences in the reflecting power of layers above the atmosphere; particularly the ionosphere, which bounces back short-wave radio frequencies.