Training Courses for the Protection from Poisonous Gases and Legal Regulations between the Two World Wars in TurkeyEyüp Talha Kocacık, Emre DölenDOI :10.26650/oba.669431Research ArticletrP. 1-56Kevkep Reşat [Duruöz] and Her Brief Career in ChemistryŞeref EtkerDOI :10.26650/oba.613870Research ArticletrP. 57-69Doctor Ömer Vasfı̇ Aybar and Türk Heki̇mi̇, the Medical Journal He Published in AnkaraCem Hakan Başaran, Nilüfer Poyraz DemirsoyDOI :10.26650/oba.594925Research ArticletrP. 71-100İbrahı̇m Edhem Pasha’s Article Titled ‘Medhal-i ‘İlm-i Jeoloji’Bilal YurtoğluDOI :10.26650/oba.593733Research ArticletrP. 101-149The Contributions of Prof. Dr. Bedi N. Şehsuvaroğlu to Turkish Medical History and Cultural StudiesNuran YıldırımDOI :10.26650/oba.582396Research ArticletrP. 151-192The Turkish and Arabic Versions of the User’s Manual of Thomas’ ArithmometerPierre AgeronDOI :10.26650/oba.594899AddendumfrP. 193-200Addenda to the First Turkish PhD Recipients in ChemistryŞeref EtkerDOI :10.26650/oba.653712AddendumtrP. 201-203The Translation of Fuad Köprülü’s Article on the History of Turkish Musicİdris ÇakıroğluDOI :10.26650/oba.559657TranslationtrP. 205-212Dr. Kırımlı Aziz’in Kimya-yı Tıbbî’sinin Bir Kimyacı Gözüyle İncelenmesiAyşe Feza GünergunDOI :10.26650/oba.645237Book ReviewtrP. 213-217İstanbul Üniversitesi Bilim Tarihi Bölümünde Konferans: “Periyodik Çizelgenin 150 Yıllık Öyküsü”Elif Çınar EsatoğluConference PapertrP. 219-223