What a scientist saw in Europe and America, Report on visit to Europe and America (1936?)
Torsion balances , seismographs – Askania-Werke AG.
Notes on applied geophysics.
Imperial Geophysical Experimental Survey
‘Research work’
Report and letters on radio physics (1940-1941)
X-ray diagnosis therapy.
The absorption and scattering of X-rays, interference (J.S. Roger’s thesis?).
Abstracts of X-ray paper (1930)
Photograph of the panel sent to Betty by J.F. Richardson (1980), Optical Munitions Panel correspondence (1939-1945).
The tropic proofing of optical instruments part I
