Log Book: 13-inch Boyden Refractor (Plate Series X): Imaging and Spectrography Programmes (1922-1924)

Title from cover: "X / 13-inch Boyden / EPEMERIS". Several programmes for direct photography and spectrography, giving lists of targets with subsequent pencilled-in plate numbers. Typed pages, pasted in to the book, describe the procedure to follow for "out-of-focus work", giving equipment settings, calibration methods, and photographic development notes. The programmes are: "Clusters" (6 open clusters), "Stars having H[beta] bright spectrums #1 [illegible]" (includes Nova Aquilae), "Globular Clusters" (19 clusters), "Spec[troscopic] Binaries 13-inch 2 Prisms" (6 stars), "Spectral Class B with bright H[ydrogen] lines 1 Prism" (29 stars), "beta Lyrae" (2 programmes), "Out-of-focus Work" (46 stars), and "Standard Stars" (typed list pasted in to book). Several loose pages inserted in the book. These contain notes and diagrams by Edward Skinner King (1861-1931), a pioneer of photographic photometry. The papers describe a programme for "out-of-focus work" and are titled "List of Stars" (1924 June 10, E.S. King), "OUT-OF-FOCUS WORK AT AREQUIPA", "OBSERVATIONS FOR EARTHLIGHT" (1924 June 11, E.S. King), and "For Light of Moon (near Full) with 13-inch Boyden Telescope" (1922 January 14, E.S. King). See, for example, Harvard College Observatory Circular Number 267 (1924) for details of this programme. n/a. Extent: 1 volume containing 28 pages. Size and dimensions of original material: Grey cloth-bound hard cover notebook. Height 26cm, width 20cm, depth 1cm. Condition of original material: stable. Custodial history: N/a. Arrangement: N/a. Alternative calendar and date: N/a, N/a Author(s)/Creator(s): English. Scribe(s): Latin. Publisher(s): Left-to-Right. Editor(s): Unrestricted. Volume number: N/a. Original institution reference: B035.