because of the variations in potency and the irregularity in absorption. The time delay before the onset of the possible effects of marijuana lowered it's popularity as a medicine as did the introduction of a variety of new and better medicines like aspirin, morphine (habit forming), chloral, barbiturates tranquilizers, and when it got on the list of drugs thought by the world community to require legal restrictions.
             Our first President, George Washington, grew cannabis on his plantation. The cannabis he grew was more fibrous and is better known as hemp. Hemp was used to make rope, twine, paper and canvas (the word "canvas" comes from Cannabis) and was an important crop in the American colonies. In Jamestown, Virginia it was grown for it's fiber qualities in 1611. (Snyder, 1985) The U.S. Pharmacopoeia had it listed as a useful medicine from the year 1870
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