FOOTNOTES:
[1] About 940 have been discovered up to the present time.
[2] Extreme values.
[3] Invisible north of 35° N. Lat. (approximate).
[4] The approximate position of the center of the constellation.
Transcriber's Note:
Obvious typographical errors have been repaired.
Mid-paragraph illustrations were moved near to the text describing the illustrated material.
Redundant title—Astronomy for Young Folks—on p. 3 was deleted.