Licks, H. E · New York, D. Van Nostrand company · leaf 122
ASTRONOMY AND THE CALENDAR "3 dial is usually placed in a horizontal plane, but in olden times they were often put on the walls of churches and public buildings, and many such can be seen in Europe even at this day. The board on which the lines of the sun dial are drawn may be of any shape, but in… … shadow [coinciding with the line 8 at eight o'clock in the morning, with the line 12 at noon, and with the line 3 at three o'clock in the afternoon. When the shadow is one- fourth of the distance from the line 3 to the line 4, the sun time is 3.15 P. M. The gnomon AB must be inclined to the plane…
Mathematical recreations
Internet Archive · Cornell University Library · Public domain (published before 1931). Free to use for anything.
![An illustration from Die Störungen des Farbensinnes [electronic resource] : ihre klinische Bedeutung und ihre Diagnose (1912)](https://img.insideoutlibrary.com/img/200/ia-b21287570-23-0.webp)
