Further Roman crank and connecting rod mechanisms, without gear train, are archaeologically attested for the 6th century AD water-powered stone sawmills at Gerasa, Jordan, and Ephesus, Turkey. A fourt ...
The earliest evidence for a connecting rod appears in the late 3rd century AD Roman Hierapolis sawmill. It also appears in two 6th century Eastern Roman saw mills excavated at Ephesus and Gerasa. The ...
Hand-powered cranks Mechanical pencil sharpenerFishing reel and other reels for cables, wires, ropes, etc.Manually operated car windowThe crank set that drives a trikke through its handles.The carpent ...
"Northern Song" redirects here. For other uses, see Northern Song (disambiguation).Emperor Taizu of Song (r. 960–976) unified China by conquering other lands during his reign, ending the upheaval of ...
Languages Zhejiang is mountainous and has therefore fostered the development of many distinct local cultures. Linguistically speaking, Zhejiang is extremely diverse. Most inhabitants of Zhejiang speak ...
Zhejiang has been neolithic sites for cultures such as Hemedu and Liangzhu. A 2007 analysis of the DNA recovered from human remains in archeological sites of prehistoric peoples along the Yangtze Rive ...
The Eastern Han, also known as the Later Han, formally began on 5 August 25, when Liu Xiu became Emperor Guangwu of Han. During the widespread rebellion against Wang Mang, the Korean state of Goguryeo ...
In 208, Cao Cao marched south with his army hoping to quickly unify the empire. Liu Biao's son Liu Cong surrendered Jing Province and Cao was able to capture a sizable fleet at Jiangling. Sun Quan, th ...
There is no set time period for the era, and many arbitrary definitions are given. The strictest rule of dating would be to deem the era to be from the point where all three states coexisted as indepe ...
Six Dynasties (Chinese: 六朝; Pinyin: Liù Cháo; 220 or 222–589) is a collective term for six Chinese dynasties in China during the periods of the Three Kingdoms (220–280 AD), Jin dynasty (265–420 ...
Archaeologist Wang Zhongshu states that shards with a celadon ceramic glaze have been recovered from Eastern Han Dynasty (25–220 AD) tomb excavations in Zhejiang; he also states that this type of cer ...
The Kasserine Dam was a Roman dam at Kasserine (ancient Cillium), Tunisia. The curved structure which dates to the 2nd century AD is variously classified as arch-gravity dam or gravity dam.
Arch-gravity dams are massive dams of concrete that resist the thrust of water by their weight using the force of gravity and the arch action.An arch-gravity dam incorporates the arch's curved design ...
Introduction into Mediterranean Sea The earliest fore-and-aft rig was the spritsail, appearing in the 2nd century BC in the Aegean Sea on small Greek craft. The lateen sail originated during the early ...
