# Page:Popular Science Monthly Volume 18.djvu/198

Fig. 4.—Shower from Camelopardus (96° ${\displaystyle +}$ 71°), August 6th-12th.
display of Perseids, and 917 to other minor streams of the same epoch. In 1869 the radiant was judged to be at η Persei; in 1871 at B. Camelopardi; and in 1874 at 44° 5812°. The average position found during the last five years has been at 44° ${\displaystyle +}$ 57°; and in the diagram (Fig. 2) a number of paths near this radiant are shown. Some of the meteors appear to be slightly erratic in their directions; but this may be explained either by errors of observation or by a double or diffused radiant point, which must often occasion non-conformity in the observed flights. In 1878 two points of departure were manifest from a series of precisely fixed courses at 44° ${\displaystyle +}$ 59° and 4212° ${\displaystyle +}$ 54°; but in 1879 the weather interrupted observations. The present year, however, afforded an exceptionally favorable opportunity to observers, and the major radiant determined by the writer was at 44° +56°, with the decided traces of a sub-radiant at 45° ${\displaystyle +}$ 60°. In 1878 Major Tupman