Editing Timeline of historic inventions (section)

====3rd century====
[[File:Römische Sägemühle.svg|thumb|Schematic of the Roman [[Hierapolis sawmill]]. Dated to the 3rd&nbsp;century&nbsp;AD, it is the earliest known machine to incorporate a [[Crank (mechanism)|crank]] and [[connecting rod]] mechanism.<ref name="Ritti, Grewe, Kessener 2007, 140, 161">Ritti, Tullia; Grewe, Klaus; Kessener, Paul (2007): "A Relief of a Water-powered Stone Saw Mill on a Sarcophagus at Hierapolis and its Implications", ''[[Journal of Roman Archaeology]]'', Vol. 20, pp.&nbsp;138–163 (140, 161)</ref><ref name="Grewe 2009, 429">Grewe, Klaus (2009): [http://www.freundeskreis-roemerkanal.de/Text/BAUTECHNIK%20IM%20ANTIKEN%20UND.pdf "Die Reliefdarstellung einer antiken Steinsägemaschine aus Hierapolis in Phrygien und ihre Bedeutung für die Technikgeschichte. Internationale Konferenz 13.−16. Juni 2007 in Istanbul"] {{webarchive|url=https://web.archive.org/web/20110511200049/http://www.freundeskreis-roemerkanal.de/Text/BAUTECHNIK%20IM%20ANTIKEN%20UND.pdf |date=11 May 2011}}, in: Bachmann, Martin (ed.): ''Bautechnik im antiken und vorantiken Kleinasien'', Byzas, Vol. 9, Ege Yayınları/Zero Prod. Ltd., Istanbul, {{ISBN|978-975-8072-23-1}}, pp.&nbsp;429–454 (429)</ref><ref name="Grewe 2010">Grewe, Klaus (2010): [http://www.traianvs.net/pdfs/2010_15_grewe.pdf "La máquina romana de serrar piedras. La representación en bajorrelieve de una sierra de piedras de la antigüedad, en Hierápolis de Frigia y su relevancia para la historia técnica (translation by Miguel Ordóñez)"], in: ''Las técnicas y las construcciones de la Ingeniería Romana'', V Congreso de las Obras Públicas Romanas, pp.&nbsp;381–401</ref>]]
* '''By at least the 3rd century:''' Crystallized sugar in India.<ref>Shaffer, Lynda N., "Southernization", ''Agricultural and Pastoral Societies in Ancient and Classical History'' edited by Michael Adas, pp.&nbsp;311, Temple University Press, {{ISBN|1-56639-832-0}}.</ref>
* '''Early 3rd century:''' [[Woodblock printing]] is invented in [[Han dynasty]] [[China]] at sometime before 220 AD. This made China become the world's first [[print culture]].<ref>{{cite book |title=The Rise of Modern China |last=Hsü |first=Immanuel C. Y. |year= 1970 |publisher= Oxford University Press |location=New York |isbn=0-19-501240-2 |page= 830}}</ref>
* '''Late 3rd century – Early 4th century:''' [[Water turbine]] in the [[Roman Empire]] in modern-day [[Tunisia]].<ref>[[Andrew Wilson (classical archaeologist)|Wilson, Andrew]] (1995): "Water-Power in North Africa and the Development of the Horizontal Water-Wheel", ''Journal of Roman Archaeology'', Vol. 8, pp.&nbsp;499–510 (507f.)</ref><ref>[[Örjan Wikander|Wikander, Örjan]] (2000): "The Water-Mill" in: Wikander, Örjan (ed.): ''Handbook of Ancient Water Technology'', Technology and Change in History, Vol. 2, Brill, Leiden, {{ISBN|90-04-11123-9}}, pp.&nbsp;371–400 (377)</ref><ref>Donners, K.; Waelkens, M.; Deckers, J. (2002): "Water Mills in the Area of Sagalassos: A Disappearing Ancient Technology", ''Anatolian Studies'', Vol. 52, pp.&nbsp;1–17 (13)</ref>