This section is from the book "A Treatise On Diet", by J. A. Paris. Also available from Amazon: A Treatise on Diet.
Peas form a wholesome and light food, when green and young, but when full grown and dry, they are very indigestible: in this latter state they contribute, in a remarkable degree, to the generation of gas in the intestines. In the form of pudding they are, if possible, still more objectionable; for, in addition to the bad qualities which depend upon their composition, are thus added those which arise from tenacity of texture. Beans, like peas, are comparatively wholesome in their immature state. The Kidney-bean, being eaten with its cod, is not so flatulent as other pulse: when well boiled, it is easy of digestion, but not very nutritive.
 
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