What name is given to a dam constructed from concrete and/or stone masonry and designed to hold back the water by using only the weight of the material and its resistance against the foundation?
Gravity Gravity dams are designed so that each section of the dam is stable and independent of any other dam section. Masonry was used in many early gravity dams, as far back as the 17th century. Concrete became more common from about 1900.
What is the name of a pipe originating in India and Persia where smoke passes from a bowl to a water bottle and thence by a tube to the mouth?
What name is given to a special day or happening, used variously over centuries to mark important days in a calendar, to mark capitals or rubrics in religious texts, or to wear particular clothing?
