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That same year Rotring launched its first drawing board, and the "Tikky" mechanical pencil was released in 1979. The "Art Pen", a fountain pen suitable for calligraphy, was launched in 1984. During the decade, Rotring set new subsidiaries in other European countries, while the "600" mechanical pencil was introduced in 1989.
Parker was born in 1895 in Morristown, New Jersey, where she grew up. [2] [3] Parker attended Howard University Academy, a high school associated with Howard University, she was awarded a certificate with honors in 1910. [4] According to census data, Parker was a cook in the kitchen in Morristown, New Jersey, and lived with her husband, a butler.
A lava tube, or pyroduct, [1] is a natural conduit formed by flowing lava from a volcanic vent that moves beneath the hardened surface of a lava flow. If lava in the tube empties, it will leave a cave .
A lava tube is a type of lava cave formed when a low-viscosity lava flow develops a continuous and hard crust, which thickens and forms a roof above the still-flowing lava stream. Tubes form in one of two ways: either by the crusting over of lava channels , or from pāhoehoe flows where the lava is moving under the surface.
Sarah Cole (1805–1857) was an American landscape painter and the sister of American landscape painter Thomas Cole. [1] Although she was among the small group of early American female landscape painters, little is known about her life and few of her paintings are known to have survived.
Lava may be erupted at a volcano or through a fracture in the crust, on land or underwater, usually at temperatures from 800 to 1,200 °C (1,470 to 2,190 °F). The volcanic rock resulting from subsequent cooling is often also called lava. A lava flow is an outpouring of lava during an effusive eruption.
An oil heater, also known as an oil-filled heater, oil-filled radiator, or column heater, is a common form of convection heater used in domestic heating. Although filled with oil , it is electrically heated and does not involve burning any oil fuel ; the oil is used as a heat reservoir (buffer).
Recent argon–argon dating suggests that eruptive activity at the Boring Lava Field began between 2.6 and 2.4 million years ago, yielding far-reaching basalt lava flows, the Highland Butte shield volcano, a number of monogenetic vents, and one andesitic lava flow. These took place near the southern Portland Basin, and were followed by about ...
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