Now we are looking on the crossword clue for: Dentist’s tool.
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Last seen on: Daily Celebrity Crossword – 8/10/20 Movie Monday
Random information on the term ” Drill”:
A bow drill is a simple rotational hand-operated tool of prehistoric origin. As a “fire drill” it was commonly used to generate friction to start a fire. With time it was adapted to woodworking and other tasks that requiring drilling, such as dentistry.
The bow drill consists of a bearing block or handhold, a spindle or drill, a hearth or fireboard, and a simple bow. Other early versions of mechanical drills include the pump drill and the hand drill.
Bow drills were used in Mehrgarh between the 4th and 5th millennium BC. This bow drill—used to drill holes into lapis lazuli and carnelian—was made of green jasper. Similar drills were found in other parts of the Indus Valley Civilization and Iran one millennium later.
The drill offers an ancient method of starting fire without matches or a lighter, a method that applies friction to generate heat. The heat eventually produces an ember in the burnt sawdust. The ember is tiny, smaller than the head of a cigarette, and fragile. Once the ember is formed it is carefully placed into a “tinder bundle” (a nest of stringy, fluffy, and combustible material). Once the ember is in the tinder bundle it is then carefully nurtured and coaxed into flame. Once the tinder bundle bursts into flame, it is placed into the fuel that has been assembled ready for ignition.