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Aquascope
An aquascope (also called bathyscope) is an underwater viewing device. It is used to view the underwater world from dry land or a boat. It eliminates the water surface glare and allows viewing as far as water clarity and light permit. The underwater viewer can be used for observing reefs, checking boat moorings, secchi disks and other survey work. It is also used as educational tool to watch plants, creatures and habitats underneath the surface of rivers, lakes and seas.〔Today's Document: (Sarah P. Mathers' Submarine Telescope )〕〔Rare and Early Newspapers: (Submarine telescope in 1843 )〕
A more advanced version, an underwater telescope was patented by Sarah Mather in 1845 and permitted sea-going vessels to survey the depths of the ocean.〔Chicago Tribune (Dec 1992) (Defying Stereotypes: The Inventive Women Of America )〕〔US Patent 3995 (S. P. MATHER. Submarine Telescope and Lamp )〕 It used a camphine lamp in a glass globe that was sunk in the water. The device allowed to examine the hull and other details from a person on the deck of a boat.〔http://www.rarenewspapers.com/view/219395〕 In 1864 Sarah Mather added an improvement to her previous invention to detect Southern underwater warships.〔Jacquelyn A. Greenblatt (1999) ''Women Scientists and Inventors'' (Page 80 ) Good Year Books ISBN 9781596472631 Retrieved 2015〕
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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