The Heavens in April. 
By Professor Samuel G. Barton of the University of Pennsylvania. 
T HIS is one of the two eclipse pe- 
riods of the year. The first eclipse 
of the year is an annular eclipse 
of the sun on April 7. The eclipse has 
no great interest for us, since no part 
of the eclipse can be seen from any 
part of the United States. The narrow 
path in which the eclipse is annular — 
The second eclipse also occurs this 
month. On April 22, in the early morn- 
ing hours — that is, after the night of 
April 21 — there will be a total eclipse of 
the moon. The earth casts a great coni- 
cal shadow in the direction opposite to 
the sun. In Figure 2 we show the cir- 
cular section of this cone 59,000 miles 
HORTri 
SouTvl 
Figure 1 The Constellations at 9 P. M., April 1. (Turn the map so that the direction faced is at 
the bottom; that is, if facing east hold east at the bottom as south now is.) 
that is, where the moon appears as a 
black disc on the face of the sun and 
with a ring of the sun about it — lies 
over the North Atlantic and Arctic 
oceans. Western Asia, Europe, North- 
ern Africa and Greenland will see the 
eclipse as partial. 
in diameter in the place where the 
moon crosses it, and the moon’s relative 
path in crossing it. The important 
times of the eclipse are the time when 
the moon first comes into contact with 
the shadow, shown in position I of 
Figure 2; the time when the moon is 
