A PHOTOGRAPHIC patrol of selected quasi-stellar objects (QSOs) has been in progress with the Yale 40 inch reflector since the autumn of 1966. On the average, about seven plates have been obtained of most QSOs, but additional plates have been taken of certain objects. Sandage1 first reported optical variations in 3C454.3. Subsequently, Angione2 published a light curve of this object, based on existing Harvard patrol plates taken over an interval of 60 yr. Over a period of 2 yr, seventeen Yale plates were obtained of 3C454.3. In addition, three plates were taken for us at the US Naval Observatory by W. Osborn. © 1969 Nature Publishing Group.
