Lectures on Practical Astronomy and Astronomical Instruments (1879)
Challis, James Rev. · Deighton, Bell and Co. (Cambridge) · leaf 293
ASTRONOMY. and Mural Circle, the Equatorial will be treated of under four Divisions. I. DescriprioN OF THE Parts AND MopE oF Mountina. 267. Figure 40 delineates a wooden model exhibited in my Lectures for indicating the parts, mounting, and uses of an Equatorial. The different parts correspond as… … are solid stone piers placed, the former southward and the other northward, so as to be cut symmetrically by the plane of the meridian, on a massive stone pillar rising about 20 feet from the level of the ground, on which also a sidereal clock (Graham
Book · Astronomy
Internet Archive · Public domain (published before 1931). Free to use for anything.
![An illustration from Cosmographia Francisci Mavrolyci Messanensis Sicvli : in tres dialogos distincta, in quibus de forma, situ numerʹoq[ue] tam coelorum q[uam] elementorum, alijsq[ue] rebus ad astronomica rudimenta spectantibus satis disseritur (1543)](https://img.insideoutlibrary.com/img/200/ia-cosmographiafran00maur-177-0.webp)
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten20unit-269-107.webp)
