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Description is exactly The brass candlestick has a bulls-eye condenser attachment. The candle stick can function with or witho ut the attachment. This accessory was used as an artificial light source to the microscope if and when natural light was unavailable. Candlesticks and lamps were commonly used by microscopists with the added modification of the bulls-eye condenser. Its origins can be found in Robert Hooke and illustrations shown in his book, Micrographia, which show the use of a glass globe filled with water to help intensify and concentrate the light from a candle. The use of optics to intensify the light of a candle or lamp was explored more closely in the nineteenth century with the creation of the bulls-eye condenser, which became a popular accessory to a microscope.
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