Science: Best Mechanic

Many say that Professor Jesse W. M. DuMond of California Institute of Technology is Science's best Mechanic. Fortnight ago international physicists at Rome inspected his multiple crystal spectrometer. Last week at Pasadena the public viewed his stereofluoroscope X-ray device.

A great difficulty in studying X-ray pictures is that, like ordinary photographs, they show no depth. Stereoscopes do indicate depth, by use of two photographs taken from slightly different angles (TIME, Oct. 19). Professor DuMond gets similar effects by using two close-set X-ray tubes and viewing through an appropriate attachment the slightly different shadows...

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