33-year old Cambridge University professor Dr. H. V. Wilkes, director of the Cambridge mathematical laboratory and ex wartime radar backroom boy, is busy putting the finishing touches to his electronic brain. This two - ton "memory" machine is the first in the world of its kind, and has been called "Edsac" (electronic Delay storage automatic calculator). The brain will complete 100,000 different calculations in a minute, and "remembers" by storing constantly moving electric and supersonic waves in a circuit of metal tubes filled with mercury. Pictures: Dr H.V. Wilkes seen adjusting the mercury tubes which formed the "brains" of the machine. Behind him are the calculating valves. 2 October 1947