Transit Micrometer Telescopes.

Chronograph & Zenith Telescope.

Signal Lamps & 80 Foot Tower.

The Finished Article.

NOAA: Determination of Time, Longitude, Latitude & Azimuth by Astronomy, US Geodetic Survey 1941 pdf.

They produced some magnificent instruments and spent a lot of money, still I defy anyone to make sense of the dazzling columns of observations .. now that I think of it the National Oceanic and Atmospheric Administration had been under fire for a long time re the amount of taxpayer's money it gobbled up, looking thru it all it seems they were having a picnic on the Governments buck .. correct me if you think I'm wrong.