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speculum
UK
/ˈspɛkjʊləm/
US
/ˈspɛkjələm/
Library
He cast and polished the speculum with great labour. +1
optics
зеркало телескопа
оптическое зеркало
«Specula» — форма множественного числа слова «speculum»; здесь имеется в виду оптическое отражающее зеркало, особенно используемое в телескопах.
Men of Invention and Industry
"Men of Invention and Industry" by Samuel Smiles is a historical account likely written in the late 19th century. The book examines the lives and contributions of various inventors and industrialists, highlighting their impact on society, particularly within British industry, with an emphasis on significant advancements such as shipbuilding and steam power. The opening of the book sets the stage with a discussion of the early history of English shipbuilding, beginning with the figure of Phineas Pett. It explores the humble beginnings of the British navy and the advancements made under historical figures like Henry VIII. Various early challenges in shipbuilding are elucidated, alongside the importance of foreign expertise in developing England’s maritime capabilities. The narrative illustrates a shift from a heavy reliance on importing goods and expertise to a burgeoning English independence in shipbuilding and trade, paving the way for a stronger national identity tied to maritime innovation.
He was, however, so much annoyed by the treacherously brittle nature of the speculum metal that he abandoned its use, and betook himself to glass.
astronomy
спекулюм-металл
Светоотражающий металлический сплав, применявшийся для изготовления зеркал телескопов.
Men of Invention and Industry
"Men of Invention and Industry" by Samuel Smiles is a historical account likely written in the late 19th century. The book examines the lives and contributions of various inventors and industrialists, highlighting their impact on society, particularly within British industry, with an emphasis on significant advancements such as shipbuilding and steam power. The opening of the book sets the stage with a discussion of the early history of English shipbuilding, beginning with the figure of Phineas Pett. It explores the humble beginnings of the British navy and the advancements made under historical figures like Henry VIII. Various early challenges in shipbuilding are elucidated, alongside the importance of foreign expertise in developing England’s maritime capabilities. The narrative illustrates a shift from a heavy reliance on importing goods and expertise to a burgeoning English independence in shipbuilding and trade, paving the way for a stronger national identity tied to maritime innovation.