Letter of declaration by R F Jackson, Executive Office, of the Center for Radiophysics and Space Research Declaring Professor Beckwith is carrying a delicate scientific instrument to California to perform an experiment at Pa;omar Mountain, Asks for him to be allowed to place the instrument in the carry-on section of the airplane so it is not handled by the baggage cre. and not x-rayed as it contains a sensitive photdetector which m ight be damaged by the exposure to high energy radiation. Provides contact details if in need of verification. 5 April 1979