Guy's elements of astronomy, and an abridgement of Keith's New treatise on the use of the globes (1832)
Guy, Joseph. [from old catalog], Keith, Thomas, 1759-1824. A new treatise on the use of the globes. [from old catalog] · Philadelphia, Key, Mielke & Biddle · leaf 179
What kind of months are they ?—And what is the length of each ?—Whence arises the difference ? Explain this by the figure.—Is the moons orbit a circle, or an el-lipsis ? How much of the moon is at one time enlightened ?—Do we alwayssee the whole enlightened side ? Refer again to the figure. What is… … The + Xorth * lJo1e # Star + 1 s
Astronomy · Celestial globes
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Vnderweysung der Messung : mit dem Zirkel vn[d] Richtscheyt in Linien, Ebnen vnnd gantzen Corporen (1525)](https://img.insideoutlibrary.com/img/200/ia-vnderweysungderm00drer-108-208.webp)
