356 KANSAS CITY REVIEW OF SCIENCE. 
through Prasepe where it makes two beautiful telescopic occultations of faint 
stars. 
Jupiter — is in right ascension 8 h. 12 min, to 8. 25 min., declination 20° 
north. It is in the constellation Cancer and rises about 1 1 o'clock P. M , 20° north 
of east. The mean apparent diameter is 36". The four satellites, lo, Europa, 
Ganymede and Calisto present many beautiful eclipses this month. 
Saturn — will rise early in the evening about 19° north of east. Apparent 
right ascension on the ist 4 h. 34 min., on the 31st 4 h. 29 min.; this position 
places it within the confines of the constellation Taurus. The rings are probably 
situated for observation, the earth being elevated above their southern surface 
25° 47'. 
Uranus — is in right ascension 11 h. 41 min. to 11 h. 47 min., declination 
north 2°; it will rise about two hours before the Sun a little north of east. It 
will be in the constellation Virgo. On the morning of the 13th it will be in 
close conjunction with Beta Virginis ; the star will be south only ^5, about one- 
sixth the diameter of our Moon. 
Neptune — will be in the constellation Aries during the entire month. Its 
position is favorable for telescopic inspection. Without the aid of a very fine 
glass it is a waste of time to try to see this planet. The right ascension on the 
ist will be 3 h. 15 min., on the 31st, 3 h. 12 min., declination north 15°. It will 
rise about 7 o'clock P. M. On the 17th it will be occultated by the Moon. 
The Moon will be partially eclipsed on the 15th; all the phases are visible. 
The time used below is Kansas City mean solar : 
Days. Hours. Minutes. 
Moon enters penumbra . ... 15 10 22.1 
Moon enters shadow 15 11 40.2 
Middle of the ecHpse 16 00 36.0 
Moon leaves shadow 16 i 31.8 
Moon leaves penumbra .... 16 2 50 2 
Magnitude of the eclipse =0.280, (Moon's diameter =1). 
Circumstances of the eclipse are, first — contact of shadow with the Moon's 
limb 132° from the north point toward the east, when she is in the zenith in longi- 
tude 93° 55' west from Greenwich, and latitude 9° 29' north. Last contact of 
shadow with the Moon's liii b 165° from the north point toward the west, when 
in the zenith of west longitude 120° 50', and latitude 9° 49' north. 
The best time to see the circular form of the earth's shadow will be at the 
middle of the eclipse, when it will be projected on the southern limb of the Moon. 
Eclipses are caused by opaque bodies casting a shadow when the rays from 
any luminous body fall upon them. Every primary and seconary planet in the 
solar system casts a shadow towards that point of the heavens which is opposite 
to the Sun. If the Sun were smaller than the earth, the earth's shadow would 
increase in diameter as the distance increases from the earth, but if the Sun and 
earth were of the same size, the shadow would be of the same size, no matter how 
