The Sunday New York Times  for June 15, 1958 reported:

                 TINY CELLS “SEEN” BY NEW TECHNIQUE

             Microphoretic Method Spots Million-Billionth
                      of Gram, London Designer Says

     Samples of substances weighing less than a million-billionth 
     of a gram can be analyzed by a new British microscopic 
     technique. This is the “microphoretic method” by Bernard M. 
     Turner, a London biochemical analyst and instruments 
     designer. It can be applied to the study of the cells of the 
     brain and nervous system, cell duplication including that in 
     cancerous tissue, and it will assist, it is believed, in the 
     analyses of atmospheric pollution by dust. . . .