Eos, Transactions American Geophysical Union

E.C. Bullard's first heat-probe



Sir Edward Bullard in 1973 said to me, “Betty, I want to tell you how my first ocean heat-flow instrument was made in the summer of 1949.” He was then on his annual 3-month visit to Scripps Institution of Oceanography and knew that I was writing a history of the institution. Teddy (as he preferred to be called) was proud of his participation in measuring the flow of heat at sea. The instrument that he described that day never made a heat-flow measurement, but it did establish the technique that has been used for more than 30 years.