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Forestry 1958 31(2):147-154; doi:10.1093/forestry/31.2.147
© 1958 by Institute of Chartered Foresters
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METHODS OF LIGHT INTENSITY MEASUREMENT IN FOREST STANDS

I. Instrumentation

R. D. CONNOR

Department of Natural Philosophy, University of Edinburgh

The paper describes shortly the instruments in use and the preparatory work of calibration and testing of equipment in the laboratory. The photographic, uranium oxalate technique, actinometer, and photo-electric methods using barrier-layer cells are all reviewed and the theory and practice of the barrier-layer cells described in detail including the action of the voltameter. The danger of cell deterioration is covered and certain difficulties arising in the field are considered.


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