1. 1959
2. Calcareous algae of the silurian of the Welsh border

   Awdur: Green, H., Ebr 1959

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

3. 1958
4. A Study in the Experimental Taxonomy of some British Sphagha (section Cuspidata),with observations of their ecology.

   Awdur: Agnew, S., 5 Mai 1958

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

5. 1953
6. The study of some phenomena observed with monochromatic X-ray beams.

   Awdur: Jones, G. P., Medi 1953

   Goruchwylydd: Owen, E. A. (Unigolyn allanol) (Goruchwylydd)

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth