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13884465
Mary Evans Picture Library makes available wonderful images created for people to enjoy over the centuries
Media ID 32336720
© Aviation Ancestry
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VISUAL DESCRIPTION
This is an advertisement for the "Husun" Improved Bubble Sextant, featuring a Booth Patent. The image shows two types of sextants, Type A. v. 135 and Type Av. 125, with detailed annotations pointing to various parts of the instruments. Key features highlighted in the advertisement include: - A sunshade box - Sunshades for direct reading - Sunshades for angle reading - Shielded light for drum illumination - Bubble chamber operating switch - Scale lighting switch The bubble sextant is described as having a special type micrometer sextant design enclosed within a case that provides protection against dust and moisture. It also mentions that it has provisions made for use of the natural horizon when required by swinging out part of its side. Additional details provided are: - Designed for both day and night use with electric lighting available. - Comes packed in a polished mahogany box weighing 5 lbs. - Dimensions: Size, (6 frac{3}{4}) x (4 frac{1}{2}) x (9) The bottom section includes information about Smith's Aircraft Instruments where this device could be purchased or ordered from their address at 195 Great Portland Street, London W1. , along with other locations mentioned across England. Overall, this image serves as historical documentation showcasing technology used in aviation navigation during the era before modern electronic aids became prevalent.
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