THE YOUNG SCIENTIST. 
107 
and 90° west of the sun July 22, at which time 
he becomes an evening- star. Mars is also ad- 
vancing among the stars, moving: from the 
middle of the constellation Pisces to 5° in Aries 
in July, keeping a little south of the Earth's 
path. There are no bright stars in his vicinity. 
Mars rises as follows : 
July 10— llh. 48m. evening. 
" 20— llh. 25m. 
" 30— llh. Om. 
Jupiter will be in a very favorable position 
for observation and very brilliant throughout 
the month, rising as follows : 
July 10— lOh. 12m. evening. 
" 20— 9h. 30m. 
" 30— 8h. 48m. 
He will be nearly 6° south of the moon July 8, 
and stationary July 2. He is retrograding or 
moving westward past the stars of the constel- 
lation Aquarius, being, in the latter part of the 
month about 8° south of the A which marks the 
northern limit of the constellation. 
JUPITER'S SATELLITES FOR JULY. 
With an inverting telescope the Satellites will 
transit Jupiter from right to left, while the 
eclipses must begi7i at the left of the shadow 
and end at the right of it; also oecultations 
begin at the left and end at the right limb of 
Jupiter's disc. The eclipses must all occur to 
the left of Jupiter for some time to come. For 
direct vision reverse the above directions. 
Satellite I. D. H. M. 
Transit begins 4 3 38 morning 
Occultation ends 5 3 6 " 
Transit (shad.,) ends 3 11 13 evening 
Transit ends 6 0 23 morning 
- Transit begins 11 4 19 " 
Eclipse begins 12 2 32 
Transit (shad.,) begins 12 10 47 evening- 
Transit, begins 12 11 53 " 
Transit (shad.,) ends 13 1 7 morning 
Transit ends 13 2 11 
Occultation ends 13 11 22 evening 
Eclipse begins 19 3 26 morning 
Transit (shad.,) begins 20 0 41 " 
Transit begins 20 1 40 " 
Transit (shad.,) ends 20 3 1 " 
Transit ends 20 3 58 " 
Transit ends 21 10 25 evening 
Transit (shad.,) begins 27 2 35 morning 
Transit begins 27 3 26 
Occultation ends 28 2 55 
Transit begins 28 9 52 evening 
Transit (shad.,) ends 28 11 23 
Transit ends 29 0 10 morning 
Satellite 11. 
Eclipse begins 2 3 0 morning 
Transit begins 3 11 43 evening 
Transit (shad.,) ends 4 0 12 morning 
D. H. M. 
Transit ends 4 2 34 morning 
Transit (shad.,) begins 10 11 55 evening 
Transit begins 11 2 9 morning 
Transit (shad.) ends 11 2 49 
Occultation ends 20 2 11 
Eclipse begins 27 0 1 " 
Transit ends 28 10 56 evening 
Satellite III. 
Occultation ends 2 1 11 morning^ 
Eclipse ends 9 0 12 
Occultation begins 9 1 21 " 
Eclipse begins 16 0 44 
Eclipse ends 16 4 12 
Transit ends 19 10 20 evening 
Transit begins 26 10 20 
Transit (shad.) 26 10 27 
Ti'ausit ends 27 1 48 morning 
Satellite IV. 
Transit (shad.,) ends 9 0 9 " 
Eclipse begins 17 3 7 " 
Transit ends 26 2 4 " 
At the time of tlie beginning of the eclipse of 
Satellite IV (July 17, 3h. 7m. morning), the Sat- 
ellites will occupy the following positions with 
respect to Jupiter : Satellites I and IV will be 
nearly equally distant at the right, and II and 
III on the left ; II being half as far again east 
as I is west, while III is double the distance ; 
direct vision being understood. 
For the time of any of the above phenomena 
at any other place than New York City, add the 
difference of time if east, and subtract the same 
if west of New York. 
Saturn will be 90° west of the sun July 7, be- 
ing an evening star after that date. He will be 
8° south of the moon July 11, and stationary 
July 28. He is moving eastward among the 
stars, and will be only about 1° southwest of 
Mars July 1. He rises as follows : 
July 10— llh. 32m. evening. 
" 20— lOh. 53ni. 
" 30— lOh. 14m. 
ephemerides of the principal stars and 
clusters for july 20, 1879. 
H. M. 
^Zp/iaAndromedae(Alpheratz) rises 8 17 even 
Beta Persei (Algol) rises 9 57 " 
Eta Tauri (Alcyone or the " Light of 
the Pleiades ") rises 0 21 morn 
Alpha Tauri (Aldebaran) rises 1 40 " 
Alpha Auriga (Capella) rises 11 4 even 
Beta Orionis (Kigel) rises 3 47 morn 
Alpha Orionis (Betelguese) rises 3 32 " 
Alpha Canis Majoris (Sirius) invisible. 
Alpha Canis Minoris (Procyon) invisible. 
Alpha Leonis (Regulus) sets 8 52 even 
Alpha Virginis (Spica) sets 10 48 " 
Alpha Bootis (Arcturus) sets 1 32 mom 
Aip/iaScorpionis (Antares) sets 0 52 " 
