Inside Out Library · ExploreLectures on Practical Astronomy and Astronomical Instruments (1879)Challis, James Rev. · Deighton, Bell and Co. (Cambridge) · leaf 340THE EQUATORIM. - 299Book · AstronomyInternet Archive · Public domain (published before 1931). Free to use for anything.More pictures from Lectures on Practical Astronomy and Astronomical InstrumentsMore like this
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten02unit-336-151.webp)
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten15unit-329-193.webp)
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten02unit-550-237.webp)
