Saltpetre
51Nitrogen — carbon ← nitrogen → oxygen ↑ N ↓ P …
52History of East Asia — History of religions Ancestor worshipWhat we know today as the ancient Chinese culture were developed in the northern area of modern China. The southern or western people spoke different languages and had their own cultures. Other areas, both the …
53U.S. Route 52 in West Virginia — Infobox road state=WV type=US route=52 length mi= yrcom=1926 direction a=South direction b=North starting terminus= at Rocky Gap, VA junction= ending terminus= previous type=WV previous route=51 next type=WV next route=53 U.S. Route 52 skirts the …
54Huolongjing — The Huolongjing (Wade Giles: Huo Lung Ching ; Traditional Chinese: 火龍經, rendered by its translator into English as Fire Drake Manual but correctly meaning Fire Dragon Manual ) is a 14th century military treatise that was compiled and edited by… …
55nitrogen fixation — 1. any process of combining atmospheric nitrogen with other elements, either by chemical means or by bacterial action: used chiefly in the preparation of fertilizers, industrial products, etc. 2. this process as performed by certain bacteria… …
56Carter Caves State Resort Park — Infobox park park=Carter Caves State Resort Park image size= caption= type=Kentucky state park location=Carter County, Kentucky coordinates= size=1,600 acres opened=1946 operator=Kentucky Department of Parks annual visitors= status=Open year… …
57Österlånggatan — (Swedish: Eastern Long Street) is a street in Gamla stan, the old town of Stockholm, Sweden. Stretching southward from Slottsbacken to Järntorget, it forms a parallel street to Baggensgatan …
58Restoration of the Sistine Chapel frescoes — The restoration of the frescoes of the Sistine Chapel was one of the most significant art restorations of the 20th century. The Sistine Chapel was built by Pope Sixtus IV within the Vatican immediately to the north of St. Peter s Basilica and… …
59List of Ordinances and Acts of the Parliament of England, 1642 to 1660 — This is a list of Ordinances and Acts of the Parliament of England from 1642 to 1660, during the English Civil War and the Interregnum.As King Charles I of England would not assent to Bills from a Parliament at war with him, decrees of Parliament …
60Ballincollig Royal Gunpowder Mills — was one of three Royal gunpowder mills that manufactured gunpowder for the British Government. The Ballincollig gunpowder mills were opened in the late 18th Century; and were bought by the Board of Ordnance in 1804. They are situated in the town… …
