288 KANSAS CITY REVIEW OF SCIENCE. 
as on the 5th. On the morning of the 14th the 1st is again eclipsed. And on 
the evening of the 14th the 2d satellite reappears after occultation, at 11 hours, 
II minutes. 
On the 15th, 8 hours, 51 minutes, 32 seconds, the rst satellite is eclipsed as 
on the 7th. Similar phenomena to the above happens on the 16th, 17th, 19th, 
2zst, 23d, 28th, 29th and 30th. 
Saturn forms another imposing object for examination this month. Rising 
as follows: On the 1st, at 8 hours, 36 minutes, p. m.; on the 30th, 6 hour, 36 
minutes, p. m. ‘The southern surface of its rings being now presented to the 
earth, we look down, as it were, from an elevation of 15 degrees above the 
plane of the rings. 
Uranus is badly situated for observation, being in conjunction with the sun; 
it rises on the 1st with the sun; on the 30th at 3 hours 47 minutes, a. m. 
Neptune rises on the 1st, 9 hours, 15 minutes, p. m., and on the 30th at 7 
hours, 19 minutes, p. m., and is nearly at its maximum brightness, but needs only 
be looked for with a telescope. 
Our Moon is in conjunction with Mercury on the 3d, Uranus and the sun on 
the 4th, Venus and Mars on the 5th, and passes 6 degrees, 57 minutes north of 
Jupiter on the morning of the 20th, 3 hours, 6 minutes, and reaches Saturn 11 
hours, 17 minutes in the evening of the same day, passing to the north 7 degrees, 
41 minutes, and on the morning of the 21st at 4 hours, 34 minutes. Neptune lies 
to the south 5 degrees, 43 minutes of arc. 
A NEW PLANETARIUM. 
The old-fashioned orreries, which were constructed to show the arrangement 
of the solar system and the motions of the planets around the sun, were some- 
what rude in their mechanism, and were apt to mislead from the conspicuousness 
of the rods and wires by which the astronomical movements were imitated. 
Signor N. Perini, an Italian long domiciled in London, and whose name is 
well-known as a successful teacher for the civil service and the army, has invented 
a new planetarium which is free from most of the defects of its predecessors. 
A high circular chamber or box, standing on twelve wooden pillars, is 
erected in the midst of an ordinary-sized room, with a ceiling higher than usual. 
On entering underneath this chamber, and looking up, a dome is seen, deep 
blue, and sprinkled with stars. The chief northern constellations are in their 
proper places, and round the base of the dome are the names of the signs of the 
zodiac. 
Suspended from the top of the dome by a narrow tube is an opal globe, lit 
inside with gas, and representing the sun. From wires almost invisible the 
planets are suspended around the sun, of sizes and at distances approximately 
proportionate to the real sizes and distances, and each having the proper inclina- 
