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Bronze mirrors were produced in China from Neolithic times until Western glass mirrors were brought to China. Bronze mirrors were usually circular, with one side polished bright, to give a reflection, and the reverse side normally decorated in cast relief in early examples, later on sometimes inlaid in precious metal. They generally had a knob ...
The lead–acid battery is a type of rechargeable battery first invented in 1859 by French physicist Gaston Planté. It is the first type of rechargeable battery ever created. Compared to modern rechargeable batteries, lead–acid batteries have relatively low energy density. Despite this, they are able to supply high surge currents.
In the early 10th century, the Persian scientist al-Razi described ways of silvering and gilding in a book on alchemy, [citation needed] but this was not done for the purpose of making mirrors. Tin-coated mirrors were first made in Europe in the 15th century. The thin tinfoil used to silver mirrors was known as "tain". [5]
The Yata no Kagami represents "wisdom" or "honesty," depending on the source. [2] Its name literally means "The Eight Ata Mirror," a reference to its size. [3] [4] Mirrors in ancient Japan represented truth because they merely reflected what was shown, and were objects of mystique and reverence (being uncommon items).
The mirrors are considered one of the eight auspicious items or "ashtamangalyam" used in the entry of a bride at a wedding venue. [4] [1] Chief minister of Kerala Pinarayi Vijayan presented an Aranmula mirror to King Hamad of Bahrain during a visit there in 2017. The British Museum in London has an Aranmula mirror 45 centimeters tall in its ...
Toli may be used in different sizes: among the Daur, the front and back of the shaman's costume was covered with small toli placed like overlapping scales while the front might also feature eight large mirrors and one medium-sized mirror to protect the heart, the neker-toli, which might be plated in nickel; [5] according to Heissig, in Hure ...
Bronze is an alloy consisting primarily of copper, commonly with about 12–12.5% tin and often with the addition of other metals (including aluminium, manganese, nickel, or zinc) and sometimes non-metals (such as phosphorus) or metalloids (such as arsenic or silicon).
Hydrogen embrittles a variety of metals including steel, [19] [20] aluminium (at high temperatures only [21]), and titanium. [22] Austempered iron is also susceptible, though austempered steel (and possibly other austempered metals) displays increased resistance to hydrogen embrittlement. [23]