Letter | Published:

The Food of the Rook

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Abstract

DR. LONG (NATURE, June 20, p. 304) raises a point which I think must appeal to many. The potential damage, represented by the 23.9 per cent, of injurious insects, is surely the one factor upon which everything depends; and, difficult though it is to see just how the necessary information is to be acquired, we are scarcely justified, so I am inclined to think, in arriving at any conclusion without it.

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