The Publications of the Washburn Observatory, University of Wisconsin, Volume II offers a detailed, technical look at the observatory’s instruments, building updates, and the methods used in late 19th‑century astronomical work. It presents practical descriptions of equipment, observations, and the procedures used to reduce data. Contents cover the physical changes to the facilities, then move into in‑depth reports on the Meridian Circle, the Fauth Transit, and other key instruments. The volume includes methods for determining instrumental constants, reductions in both right ascension and declination, and extensive tables and supplementary material related to surveys, star counts, and meteorological observations. It also adds appendices and catalogs that document the observatory’s library and related scientific resources. Ground‑level updates to rooms, domes, and mounting for major instruments - Technical descriptions of pivots, collars, micrometers, and other components of precision instruments - Methods for calculating constants, reduction formulas, and procedures for data processing - Extensive tables, star counts, and astronomical observations spanning multiple years Ideal for readers of historical scientific apparatus, archival astronomy, and the practical side of 19th‑century observational astronomy.