User:Berroudji nor El houda/sandbox

THE NATURE                    -The nature is a scientific popularization,journal founded in 1873 by Gaston-Tissandier in 1972 ,it is absorbed by recherche.the nature is a magazine  illustrated  :the front  east  of Albert  Tissandier in 1877 ,Louis poyet enters  the icronographic service called, by the brothers Tissandier weekly until  1826 ,it change  periodicity  is accompanied  by other change explained  in two pqge not. format:the magazine gains in width but not in height so as not to hinder  subscribers  in their storage pigna -on passage of 16 page0+8page  of supplement  in week to 48 hours page every  two weeks  from 1873 to 1914 ,each year beginsat the beginning  of December .The second  semester  begins with the first  issue  of june.From 1915 the Years of nature coincide with the calendar  years. During the first word  war the declaration of war disrupted  the publication  of the newspaper,which had only six issue  from the end of July  1914 to the beginning  of january 1915.Its publication normally  resumes  at the end of 1918.But the magazine .becomes bi-monthly in 1919,before  becoming  weekly  again  in 1921. During the second world war,the publication of the magazine was very erratic .A first  interruption  of publication  takes place from September 15 to December  15,1939 and only six issue to published  during .the year 1940. The issue of second half  of 1939 and 1940 constitute the sixty -eighth year  of the magazine .The year 1941 has 12 issue dated  the 15th of each month.Other publication  suspension  take place .There are only  26 issue from 1942 to 1945. After the second world war the magazine returned to its pre-war periodicity in 1945.March 1948,the journal Nature  becomes  monthly In1961.Nature  took the name of Nature  science  progress then in 1963 that of science  progress Nature  before  becoming  science  progress  Nature  discovery  in October  1969.finally ,in1972,it merged. http://histoires-de-sciences.over-blog.fr/2013/11/articles-%C3%A9lectricit%C3%A9-dans-la-nature.-revue-des-sciences-et-de-leurs-applications-aux-arts-et-%C3%A0-l%E2%80%99industrie.html