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The tempest prognosticator, also known as the leech barometer, is a 19th-century invention by George Merryweather in which leeches are used in a barometer. The twelve leeches are kept in small bottles inside the device; when they become agitated by an approaching storm, they attempt to climb out of the bottles and trigger a small hammer which ...
His best-known invention was the Tempest Prognosticator—a weather predicting device also called "The Leech Barometer". [2] It consists of twelve glass bottles containing leeches, which, when disturbed by the atmospheric conditions preceding a storm, climb upwards, triggering a small whalebone hammer which rings a bell.
This is a list of free and open-source software packages (), computer software licensed under free software licenses and open-source licenses.Software that fits the Free Software Definition may be more appropriately called free software; the GNU project in particular objects to their works being referred to as open-source. [1]
NOVAS is a software library for astrometry-related numerical computations. Both Fortran and C versions are available. Netlib is a repository of scientific computing software which contains a large number of separate programs and libraries including BLAS, EISPACK, LAPACK and others. PAW is a free data analysis package developed at CERN.
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Free software portal; Science portal; This category is for software used for studying, emulating, or displaying the result of scientific investigation and which is distributed as free software – under a free software licence, with the source code available.
YAK is a library of common actions, Kernels, boundary conditions, and material base classes for radiation transport applications. YAK is currently linked with RattleSnake (multi-group radiation Sn transport), Pronghorn (multi-group diffusion), and Critter (multi-length scale temperature feedback).
The 2025 New Year’s Eve numerals are seen on display in Times Square on December 18 in New York City. (Michael M. Santiago/Getty Images)