[Advertisement for airship height indicator tool]

Advertisement for an airship height indicator tool created by John Sylvester Wheelwright, circa 1910s-1920s.

Part of a photograph album related to John Sylvester Wheelwright's service with the Royal Naval Air Service, circa 1907-1943.

Materials were digitized as part of a Digitizing Hidden Collections grant from the Council on Library and Information Resources (CLIR). Digital files are made available under Creative Commons license CC BY-NC-ND. For commercial use, please inquire via our image/research request form.