Information relative to the construction and maintenance of time-balls / prepared under the dir. of W.B. HazenWilliam Babcock Hazen · 1881

Information relative to the construction and maintenance of time-balls / prepared under the dir. of W.B. Hazen

paperRijksmuseum · Public domainLindy Arts

Information relative to the construction and maintenance of time-balls / prepared under the dir. of W.B. Hazen

William Babcock Hazen · 1881

Information relative to the construction and maintenance of time-balls / prepared under the dir. of W.B. Hazen

paper

Rijksmuseum · Public domain