@proceedings {, title = { La d{\'e}termination des longitudes dans l{\textquoteright}espace grec (XVIIe-XIXe si{\`e}cle)}, year = {2002}, publisher = {Universit{\'e} Rennes2 - Haute Bretagne}, address = {Brest, France}, abstract = {The paper presents the calculus and determination of the longitudes of Greece, from the first modern attempts at the 17th century until the wireless determination of Athens longitude in 1923, as well as the instrumentation used.}, attachments = {https://www.hasi.gr/el/system/files/longitudes.doc}, author = {Efthymios Nicolaidis}, editor = {Vincent Jullien} } @conference {, title = {The Greek collections of 19th century scientific instruments}, year = {1999}, abstract = {At the foundation of the Greek state in 1830, educational institutions like those of Western Europe were created : primary and secondary schools, a military school, a university, a technical school. Later an observatory will also be created. Education and science became then a State affair and the acquisition of scientific instruments too. The paper presents the main scientific instrument acquisitions during the 19th century.}, attachments = {https://www.hasi.gr/el/system/files/Greek\%20Collections.doc}, author = {Efthymios Nicolaidis} }