Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 21
otographs (see Fig. 4), up towards the edges and the wear of thetraffic would have completed the effectfrom the air of a ploughed field. Nowthe tone of the plough in a photographalways tends to lightness, and it followstherefore that tracks being of the samevalue they would be very difficult to…
Lighting
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