122 PHILOSOPHICAL SOCIETY OF WASHINGTON 
Page. 
Astronomy, List of papers on—Cont’d. 
on the zodiacal light. S. Alexander. Com- 
municated by J. E. Hilgard. In full; 9 
TROPA ER ccs aN as tonim ncacchenepiedarntessteusted 1105, (19) 
on Sir William Herschel’s observations of 
the satellites of Uranus. E.S. Holden. 
Tit PUY .cscascecenvsecscersoscesswoscsepseesesees i 106, (30) 
a new apparatus for the investigation of 
personal error in astronomical transit 
observations. J. E. Hilgard. Title 
Ot pmectendcatebsae tence custancasceseaseansa anaes eeseeeeh 106 
on the position of the planes of certain 
nebule, C. Abbe. Abstract and refer- 
NOB vascaverceesviencassanae pike ences Bvedettewteas & LOD) 
on the correction of a comet’s orbit. O. 
Stone. Reference... ié3 scesechl §=22 
[letier on transit of Veuis; 1874] ms ‘HL, F. 
Peters. Communicated by A. Hall. <Ab- 
SUT OCU. cansacsskeoreaes ada dassusedueces sodeacesdnsucet ii 31 
[letter on transit of Venus, 1874.] C. W. 
Raymond. Communicated by A. Hall. 
SAIDSURGET .ccesantencasdersrertceeevenssecseacdens wed 31 
[letters] on the operations of the several 
parties sent from the United States to 
observe the transit of Venus on the 8th 
of Dee’r, 1874. A. Hall. Abstract. ....44 31,32 
[letter on transit of Venus, 1874.] W. Hark- 
ness. Communicated by A. Hall. <Ab- 
SUNACE sevccrcencsccsncsecnastorcnacsscodcssneanseusnan ii 32 
[letter on transit of ae 1874.] G. David- 
son. Communicated by A. Hall. Ab- 
SUCH stcesnattvies race on series ea Sacer ti 
the expedition to Pekin for observing the 
late transit of Venus [1874]. C. A. 
VOW, ee ALOSUOCH ssdansnsnthcesn «cnokesanceboes ii 33 
on the transit of Venus [1874]. S. New- 
COMP. —LIGle ONLY \ccedourssnansneanse meestarredk, 40 
two drawings of nebula, made with the 
XXVI-inch telescope of the U.S. Naval 
Observatory, by Mr. L. Trouvelot, of 
Cambridge, Mass. E.S. Holden. Ab- 
SUNCED rcacussiadacvonscvascusceisee cvioccosences spocssee Ai 51 
the methods of measuring the inequalities 
of the pivots of a transit instrument. 
W. Harkness. Title only.....cccere covers ii 68 
the temperature of space. W. B. Taylor. 
CA DSU OChoasuvetaansnonotin shee cucsvecessrass<ausanis ii 73 
[search for Vulcan.] E. S. Holden. <Ab- 
SUPACEcoresevsscancencsasyoscesceaseverseusapensions=ne ii 85 
the appearance of Saturn’s rings. A. Hall. 
A DSENGECD scence cccucrssceaccen seeuuds=voternseuperase ii 94 
on reference catalogues of astronomical 
papers and memoirs. E. S. Holden. 
Abstract....... btavskpseead poasereghaveciekennenant Mi 95 
the shadow of the ball of Saturn projected 
ontherings. E.8. Holden. Abstract..ii 101 
Page. 
Astronomy, List of papers on—Cont’d. 
a bright spot which [has] recently become 
visible on the ball of Saturn. A. Hall. 
Abstract... cae «Ad 102 
the coamogony. 's. Naweomb, Title outer ii 113 
report of the committee to collect informa- 
tion relative to the meteor of Decem- 
ber 24th, 1873. Read by C. Abbe. In 
full; 2 figures, 1 MAD ..ccccceereeceereekd 123, 139 
the position of the centre of gravity of the 
apparent disk of a planet. A. Hall. 
Reference ..... acuecebasesed=neeneate WecteneWeaae ii 181 
the results of [a] search for satellites of 
Mars. <A. Hall. Abstract and refer- 
ENCE sdvueiiceucds tusscwecesesssecesaeuehae cacnbopennean di 186 
the nebular hypothesis and the inner moon 
of Mars. M. H. Doolittle. Abstract, 
ii 1838, 190 
aerolithic disturbance of planetary mo- 
tions. M.H. Doolittle. <Abstract......41 190 
the recent transit of Mercury [1878]. S. 
Newcomb. AdSstract....ccccrscssscssecscerehd 199 
& new eye-piece for observing personal 
equations. A. Schott. Title only......i4 200 
the velocity of light and determination of 
the solar parallax. W. Harkness. Title 
OMe .ssnnncscovuscsosdbsedsecuenebsensvesnusseshsaunteam meen 
observations of the total solar eclipse, July 
29,1878. S. Newcomb. Abstract.......i% 202 
notes on the brightness and the stellar 
magnitude of the third Saturnian sat- 
ellite, Tethys. E.S. Holden. Read by 
A. N. Skinner. Ditle only......0000...-. Add 18 
on the supposed discovery ot a trans-Nep- 
tunian planet at the U. S. Naval Ob- 
servatory in 1850. A. Hall. Abstract.dil 20 
a note on the precession of stars in right 
ascension. A.N.Skinner. Title only, 
see eeeeeeneee 
iii 21 
on the satellites of Saturn. A. Hall. Ab- 
SEPACE «2.0000 Coktaesbodesteterase ccaseesnens Carte iii 26 
@ personal equation instrument. J. R. 
Eastman. Abstract........ avodeanet See Lil 33, 37 
the recurrence of eclipses. S. Newcomb. 
Title Ot .: ccscavatnsaczssacuscceaeanee oraneen Ald 33 
notes on the orbits of Titan and Hyperion. 
A. Hall. AbSt7 Get.....ccuss-2s ceansasnarennaye ee aeeeO 
some results from the dissussion of the 
observations of the transit of Mercury 
of May 6, 1878. J. R. Eastman Ab- 
STTACL .. 200000 eeaneueasaee Berenice: enneseestead iii 43 
a recent visit to California to inspect a site 
for the new Lick Observatory. S. New- 
COMb. Title Only .....cMWrsecccrrscscsconsokht 45 
solar parallax from the velocity of light. 
D. P. Todd. Reference........ asaeoe eases iii 74 
