Bark (botany) rope, used for example in the rigging of Viking age longships. Among the commercial products made from bark are cork, cinnamon, quinine (from the bark of Cinchona) and aspirin (from the bark of willow trees). The bark of some trees notably oak ("Quercus robur") is a source of tannic acid, which is used in tanning. Bark chips generated as a by-product of lumber production are often used in bark mulch in western North America. Bark is important to the horticultural industry since in shredded form it is used for plants that do not thrive in ordinary soil, such as epiphytes.
Hippocrates (lunar crater) number of tiny craterlets, and is slightly wider at the southern edge with a ridge-like projection. The interior floor is level and almost featureless, with only a few tiny craterlets to mark the surface. This crater was named after Hippocrates, the ancient Greek physician. By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Hippocrates. Hippocrates (lunar crater) Hippocrates is a lunar impact crater on the far side of the Moon. It is located in the northern region of the lunar surface, to the north of