The wireless transmitter, in watertight container, is loaded by technical assistants. The timing device is the common alarm clock. cut-off mechanism for releasing the parachute, and the sand release for controlling level *****. Britain's atomic ***** led by Nobel prize winner Professor C.F. Powell, are planning to explore 25 miles into the stratosphere in the search for the slusive meson - the atomic particle too tiny to be seen with any microscope, that mey hold the clue to the mysterious binding force of the atom nucleus. November 25, 1950. (Photo by Reuterphoto).