Correspondence

Report of the Building Research Board for the year 1938, DSIR, p. 127 (Fig. 49), HMSO, London (1939 ).

Dufton, A.F. , J. Scien. Instrum., 17 (9), 226 (1940).

Higbie, H.H. and Moore, A.D. , Prediction of natural illumination in interiors and on walls of buildings , Proceedings of International Illumination Congress , England, 1149-1166 (1931).

Dufton, A.F. , Protractors for the computation of daylight factors, DSIR Building Research Technical Paper, No. 28, HMSO, London (1946).

Dufton, A.F. , Trans. Illum. Eng. Soc. (London), 8 (3), 61 (1943).