Journal Article Two Notable Contributions to Economic History Get access Abbott Payson Usher Abbott Payson Usher Harvard University Search for other works by this author on: Oxford Academic Google Scholar The Quarterly Journal of Economics, Volume 48, Issue 1, November 1933, Pages 171–180, https://doi.org/10.2307/1884801 Published: 01 November 1933

Nature of the data, — Tonnage of the merchant fleet, Table I, 466. — Shipping cleared in foreign trade, Table II, 469. — Entrances at London, Table III, 470. — Synoptic graph, 473. — Size of vessels, Tables IV and V, 475, 476. — Conclusion, 478.

I. Alleged danger of soil exhaustion. — Relation of this belief to the humus theory and the system of statics, 386. — Formulation of the mineral theory the work of Liebig, 387. — Discrepancies between his principles and the results of experimental work, 388. — Liebig's principles and the modern doctrine of soil exhaustion, 390. — II. Computations of the durability of average soils, 391. — Qualifications necessary to adapt these figures to the crop yields of low farming, 394. — The importance of the returns of nutritive substances made in low farming, 396. — III. Liebig's insistence upon complete replacement of the minerals removed in the crop, 399. — Recent concepts of the fertility program, 401. — Evidences of undiminished yields despite some progressive depletion of minerals, 403. — Presumptions created by recent studies of the soil solution, 404. — Declines in yield due to decreasing supplies of nitrogen, 406. — Replacement of nitrogen by natural processes, 407. — The need of lime on acid soils, 408. — Conclusions, 410.

The Genesis of Modern Capitalism Get access Abbott Payson Usher Abbott Payson Usher Boston University Search for other works by this author on: Oxford Academic Google Scholar The Quarterly Journal of Economics, Volume 36, Issue 3, May 1922, Pages 525–535, https://doi.org/10.2307/1886036 Published: 01 May 1922

Journal Article The Content of the Value Concept Get access Abbott Payson Usher Abbott Payson Usher Cornell University Search for other works by this author on: Oxford Academic Google Scholar The Quarterly Journal of Economics, Volume 31, Issue 4, August 1917, Pages 711–718, https://doi.org/10.2307/1884043 Published: 01 August 1917

Journal Article The French Corn Laws during the Period of Local Control, 1515–1660 Get access Abbott Payson Usher Abbott Payson Usher Harvard University Search for other works by this author on: Oxford Academic Google Scholar The Quarterly Journal of Economics, Volume 19, Issue 3, May 1905, Pages 452–491, https://doi.org/10.2307/1882661 Published: 01 May 1905