Astronography, or, Astronomical geography, with the use of globes : arranged either for simultaneous reading and study in classes, or for study in the common method (1854)
in order to obtain amethod by which the measure of arcs can be determined ? Howare circles divided ? What more minute divisions are used ? Ifwe take a Great Circle of the Earth (which is the measure of theEarths circumference), to what is each degree, or 360th part,equal ? How is this reckoned ?… … xio- other at : I >UT equal - at th»- et-ntre are equal, and Uieyare all r Sii •• the measure of the circle is 860 degrees, that of a quarter of a aide b ^(|An i subtends half a right angle, and an an of ■ ally, all angles are mscwtred ty tts ares and it makes no difference whetb r • nee of the…
Astronomy
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-34-61.webp)
