Show money in tea sweepings one of the principal sources of the supply of caffeine in england is the sweepings of tea from the floors of the various docks wharves and warehouses in london these sweepings aggregate pounds of tea annually or with the dirt nails hoop iron and wood which pets mixed with the tea to about four hundred tons the loss to the tea importers annually is about the sweepings have naturally a fair proportion of to fine grade teas mixed with them and consequently contain a larger amount of the active principle of tea called by chemists caffeine than the low quality teas the sweepings cost the chemists only about one half a cent per pound merchants review |