| Description | Slide shows a diagram which appears to be an illustration of a pool or pond. The diagram is labelled with various letters, for which there is no corresponding explanation. Two significant labels read: 'ingoing stream' and 'outgoing stream', which suggests that it is a marine diagram.
Label below diagram reads: 'Fig. 4 (After Orton, J. H., and Worsnop, E., Min. Agric. Fish., Fishery Investigations, series ii, vol vi, no.3, pp.1-199, 1923 (1924))'. |