A single Black and Mild's tobacco can contain roughly 100200 mg of nicotine, figures that trace back to a 2007 Baltimore City Health Department analysis and are still widely cited today
[19] [20] Thus, tobacco production, like other agricultural activities outside of export, was predominantly based on enslaved African labor and was part of the set of strategic products of the colonial economy, subject to control and oversight mechanisms by the Portuguese administration
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Large tobacco warehouses filled the areas near the wharves of new, thriving towns such as Dumfries on the Potomac, Richmond and Manchester at the Fall Line (head of navigation) on the James, and Petersburg on the Appomattox
The range is broad because the level of nicotine depends on many different factors, such as how the tobacco is grown and processed, the size of the cut of the leaves, and the pH of the product