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Showing posts from February 11, 2019

Grand Séminaire de Montréal

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Grand Séminaire de Montréal Motto In Dilectione et Scientia Type Public Established 1967 Location Montreal , Quebec , Canada Website Grand séminaire de Montréal The Grand séminaire de Montréal ("Major Seminary of Montreal") is the sacerdotal school of the Roman Catholic Archdiocese of Montreal. History The institution was founded by the Sulpicians in 1840 on the demands of Ignace Bourget. A branch of Université Laval's faculty of theology was installed in the seminary in 1878. This faculty was transferred to the Université de Montréal in 1967. Gallery Front entrance Front courtyard External links Grand séminaire de Montréal - official site Chapel of the Grand Seminaire de Montreal: Photo Gallery by The Catholic Photographer v t e Catholic seminaries in Canada Diocesan seminaries Seminary of Christ the King, British Columbia St. Joseph's Seminary, Edmonton ...

History of the telephone

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History of the telephone From Wikipedia, the free encyclopedia Jump to navigation Jump to search Actor portraying Alexander Graham Bell in a 1915 silent film. Shows Bell's first telephone transmitter (microphone), invented 1876 and first displayed at the Centennial Exposition, Philadelphia. This history of the telephone chronicles the development of the electrical telephone, and includes a brief review of its predecessors. Contents 1 Telephone prehistory 1.1 Mechanical devices 1.2 Electrical devices 2 Invention of the telephone 2.1 Telephone exchange 3 Early telephone developments 4 Early commercial instruments 5 20th century developments 6 Women's usage in the 20th century 7 21st century developments 8 See also 9 References 10 Further reading 11 External links Telephone prehistory [ edit ] Mechanical devices [ edit ] A 19th centu...

Is there such a thing as a “minimal soap” molecule?

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15 $begingroup$ Wikipedia's Soap gives sodium stearate as an example of soap, and apparently I've been eating it: Sodium stearate is the sodium salt of stearic acid. This white solid is the most common soap. It is found in many types of solid deodorants, rubbers, latex paints, and inks. It is also a component of some food additives and food flavorings. What would be the smallest or simplest molecule that we could reasonably call a soap? Perhaps a functional definition would be that it could perform some of the functions of soap in the same way that soap does. In Why does bleach feel slippery? and its follow-up Is it known for sure that bases feel slippery because of the production of soap/surfactant? the saponification of other existing molecules is discussed, and I'm not looking for that here...