Hottentot (racial term) in an ethnic sense. From the eighteenth century onwards, the term "hottentot" was also a term of abuse without a specific ethnic sense, comparable to "barbarian" or "cannibal". In its ethnic sense, it had developed connotations of savagery and primitivism soon already in the seventeenth century: colonial depictions of the Hottentots (Khoikhoi) in the seventeenth to eighteenth century were characterized by savagery, often suggestive of cannibalism or the consumption of raw flesh, physiological features such as steatopygia and elongated labia perceived as primitive or "simian"; and a perception of the click sounds in the Khoikhoi languages as "bestial". Thus it
Miner's apron vibration by acting as a sort of kidney belt. The miner's apron was a triangular or, more rarely, semi-circular piece of leather and was supported by the body belt. In Germany the design of the modern miner's apron is governed by DIN standard 23307 "Gesäßleder für den Bergbau (Arschleder)". The mining apron was introduced to German mining regions in the 15th century from the Slovakian mining area around Schemnitz (Banská Štiavnica). Early illustrations of it are found on the title page of the "Little Mining Book" ("Bergbüchlein") by Ulrich Rülein von Calw (1505) and on the miner's altar of St.