Prindplei, ch. xxi, pp. 174 sqq

57. Il est naturel que cette théorie ait été la conséquence des réflenou •de Ricardo sur la loi de la rente foncière et de sa répercussion sur la distribution sociale des richesses. On rencontre pourtant déjà une allnsion à cette théorie dans une lettre de Ricardo à Malthus, du 17 aoât 1810 : That we bave experienced a great increase of wealth and prosperily aince the commencement of the war, I am amongst the foremost to beliefv« ; but it is not certain that such increase raust hâve been atteaded by increased profits, or rather an increased rate of profits, for that is tbe •question between us... My conclusion is that tbere has been a rapid increase of capital, which has been prevented fi«om showing itaelf U a low rate of interest by new facilities in the production of food.