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[1] A simple, so-called "lateral" harmonograph uses two pendulums to control the movement of a pen relative to a drawing surface. One pendulum moves the pen back and forth along one axis, and the other pendulum moves the drawing surface back and forth along a perpendicular axis.
A mimeograph machine (often abbreviated to mimeo, sometimes called a stencil duplicator or stencil machine) was a low-cost duplicating machine that worked by forcing ink through a stencil onto paper. [1] The process was called mimeography, and a copy made by the process was a mimeograph.
In organic chemistry, phenols, sometimes called phenolics, are a class of chemical compounds consisting of one or more hydroxyl groups (−O H) bonded directly to an aromatic hydrocarbon group. [1] The simplest is phenol, C 6 H 5 OH. Phenolic compounds are classified as simple phenols or polyphenols based on the number of phenol units in the ...
Syringol is the organic compound with the formula HO(CH 3 O) 2 C 6 H 3.The molecule is a phenol, with methoxy groups in the flanking (2 and 6) positions. It is the symmetrically dimethylated derivative of pyrogallol.
2,6-di-tert-butylphenol is a precursor to more complex compounds used as antioxidants and light-protection agents for the stabilization for polymers. Of particular note is methyl-3-(3,5-di- tert -butyl-4-hydroxyphenyl)-propionate (CAS# 6386-38-5), which is formed by the Michael addition of methyl acrylate .
LDS-1 (Line Drawing System-1) was a calligraphic (vector, rather than raster) display processor and display device created by Evans & Sutherland in 1969. [1] This model was known as the first graphics device with a graphics processing unit .
It was Waddingtons who renamed the game Cluedo (a combination of "Clue" and "Ludo", a Latin word meaning "I play", and the name of a popular board game in the UK). But material shortages in post-war Britain meant the game did not go into production until 1949. Pratt was granted patent GB586817 'Improvements in Board Games' on 1 April 1947. [5]
A Tipler cylinder is used as a plot device in Chuck Grossart's story "The Phoenix Descent". Episode 9 of the webseries Ask Weathersby [14] mentions the Tipler cylinder, discussing time travel. [15] In "The Miracle of Christmas", Episode 2.11 of the American TV series Timeless, a Tipler cylinder is mentioned as being added to an upgraded time ...