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Portable Inkwell
 rom our perspective, none of their tons of supplies, not even the guns, powder, and bullets with which they fed themselves, was ultimately as important as the pens, pencils, ink, and paper they carried, and protected from the elements. Although the lists of stores purchased in Philadelphia show only a few "papers" of powdered ink; the captains must have purchased more, perhaps in St. Louis.
It is one of those curious little paradoxes of history that so little is known of the story of ink because so little has been written about it. Ink of some sort was invented around 2500 BC, consisting of a pigment or dye, sometimes the carbon residue from oil-burning lamps, which was dissolved or dispersed in a liquid glue or gum, molded into sticks, and allowed to dry. The process of grating a stick and mixing the powder with just the right amount of water was the critical step. Temperature, of course, had a lot to do with the flow of ink, and not just in wintertime. The morning of August 21, 1805, was so cold that Lewis complained, "the ink freizes in my pen."
Indeed, though the barometers of that day were too big and fragile for the expedition to bother with, the journalists' inkwells provided anecdotal observations on humidity. The weather diary for September 23, 1804 contains Clark's comment that he had been having to replenish his ink stand every day, "at least 9/10 of which must evaperate."--Joseph Mussulman
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Trade Beads