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British slave traders were early and rapid adopters of the new technique of sheathing ships' hulls with copper. From the 1780s this innovation increased sailing speeds of British slave ships by about a sixth, prolonged the ships' lives by at least a half, and reduced the death rates of slaves on the middle passage by about half. It was, above all, the fall in death rates, and possibly the improved...
New annual series for the prices of major agricultural commodities sold in London markets between 1770 and 1914 are presented. These series are based on bimonthly observations drawn from newspaper market reports. The products covered are wheat, barley (grinding and malting), oats, potatoes, hay, butter, beef, mutton, and pork. Annual prices are calculated for both calendar and production years. The...
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