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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. Merryweather referred ...
National Flag of Canada Day was instituted in 1996 by an Order in Council from Governor General Roméo LeBlanc, on the initiative of Prime Minister Jean Chrétien. [7] At the first Flag Day ceremony in Hull, Quebec, Chrétien was confronted by demonstrators against proposed cuts to the unemployment insurance system, and while walking through the crowd he was grabbed by the neck and pushed ...
An example of 500 mbar geopotential height and absolute vorticity prediction from a numerical weather prediction model Main article: Numerical weather prediction The basic idea of numerical weather prediction is to sample the state of the fluid at a given time and use the equations of fluid dynamics and thermodynamics to estimate the state of ...
The first tide predicting machine (TPM) was built in 1872 by the Légé Engineering Company. [11] A model of it was exhibited at the British Association meeting in 1873 [12] (for computing 8 tidal components), followed in 1875-76 by a machine on a slightly larger scale (for computing 10 tidal components), was designed by Sir William Thomson (who later became Lord Kelvin). [13]
The national flag of Canada (at left) being flown with the flags of the 10 Canadian provinces and 3 territories. The Department of Canadian Heritage lays out protocol guidelines for the display of flags, including an order of precedence; these instructions are only conventional, however, and are generally intended to show respect for what are considered important symbols of the state or ...
CMC building viewed from the West CMC building viewed from the South. The Canadian Meteorological Centre (CMC; French: Centre météorologique canadien), located in Dorval, Quebec, is the branch of Environment Canada's Meteorological Service of Canada that is tasked with providing forecast guidance to national and regional prediction centres, and is responsible for running the Global ...
Canada Day, [a] formerly known as Dominion Day, [b] is the national day of Canada.A federal statutory holiday, it celebrates the anniversary of Canadian Confederation which occurred on July 1, 1867, with the passing of the British North America Act, 1867, when the three separate colonies of the United Canadas, Nova Scotia, and New Brunswick were united into a single dominion within the British ...