Transcriber's Note
Higher resolution versions of the star maps and lunar charts may be accessed by clicking on the images in the text.
A link to the Index has been added to the Table of Contents
Minor errors and inconsistencies in punctuation and hyphenation have been silently corrected.
The following minor corrections have also been made:
p3: "wil" corrected to "will"
p28: Σ 629, referred to, is not shown on Map No. 1. The location of m Orionis is marked as Σ 696
p54: "for colors" corrected to "four colors"
p68: "1,065,790,250,000,000" corrected to "1,065,702,500,000,000"
p163-164: "magnical" corrected to "magical"
p179: duplicated word "and" removed
p198: "Map No. 26, 137" added after "Ursa Major"