ELLIOT(1875) p373 Fig.31 - Osnaghi's reflector for fixed light.jpg
en
ELLIOT(1875) p373 Fig.31 Osnaghi's reflector for fixed light, European Light-House Systems (1875) by ELLIOT, Uploaded by the British Library, Images from the British Library Mechanical Curator collection, Images from the British Library
commons
ja
ELLIOT(1875) p373 Fig.31 オズナギの固定光向け反射鏡、欧州光住宅システム(1875)
commons_translated
implausibility