INDEX TO VOLUMES I-X. 
145 
\ 
Page. 
llall, Asaph, communication on—Cont’d. 
the method adopted in writing the in¬ 
ternational scientific telegrams. Ab¬ 
stract .i 101 
the operations of the several parties sent 
from the United States to observe the 
transit of Venus on the 8 th of Decem¬ 
ber, 1874. Abstract .li 31, 32 
approximate quadratures. Abstract, 
li 48 
the appearance of Saturn’s rings. Ab¬ 
stract .ii 94 
a bright spot which has recently become 
visible on the ball of Saturn. Ab¬ 
stract . ii 102 
the position of the centre of gT-avity of 
the apparent disk of a planet. Refer¬ 
ence .ii 181 
the results of a search for satellites of 
Mars. Abstract and reference .li 186 
the supposed discovery of a trans-Nep- 
tunian planet at the U. S. Naval Ob¬ 
servatory in 1850. Abstract .iii 20 
the satellites of Saturn. Abstract .ill 26 
the orbits of Titan and Hyperion. Ab¬ 
stract . iii 40 
inaugural address as chairman of the 
Mathematical Section. In full .vi 117 
the determination of the mass of a 
planet from observation of two satel¬ 
lites. Abstract . vl 132 
the formulae for computing the position 
of a satellite. In full. \ figure .vil 93 
American scientific societies. Presiden¬ 
tial address. In full .viii xxxiii, 30 
variations of latitude. Abstract and ref¬ 
erence .viii 10 
the new star in the nebula of Andro¬ 
meda. Reference .ix 14 
the images of stars. Reference .lx 15 
a problem in probabilites. Read by G. 
W. mu. No abstract .x 88 
the parallax of a Tauri. Abstract .x 91 
Euler’s theorem (generally called Lam¬ 
bert’s). Abstract .x 101 
Longitude of Plover Bay by.iv 124,126 
remarks on planetary motions...ii 188, 189, 192 
transit of Mercury.ii 199 
criteria for the rejection of observa¬ 
tions.vl 155 
Grassmann’s geometry.viii 53 
time determinations.viii 58 
Hall, G. S., communication on recent expe¬ 
riments on reaction time and the time 
sense. Title only .viii 4 
Haller, A. von, cited on nerve currents.v 61 
10 
Page. 
Hallowell, Benjamin, letter on the meteor 
of December 24, 1873. Communicated 
by J. Henry. No abstract .i 95 
Halo, A remarkable solar.v 112 
Hamilton, Sir W., cited on ultimate causes, 
V163,166 
Harkness, William, communication on the 
physical constitution of the corona of 
the sun. Reference .1 31 
the spectrum of Encke’s comet. Refer¬ 
ence . 1 34 
the spectrum of Encke’s comet, and the 
appearance of Tuttle’s comet. Refer¬ 
ence .1 34 
the density of the hypothetical resisting 
medium in space. Title and refer¬ 
ence . i 39 
some measurements of heights by a 
pocket aneroid. Title only . i 64 
the power necessary to drive the pendu¬ 
lum of an astronomical clock. Title 
only . i 74 
the distribution of temperature over the 
surface of the globe. Referenee . i 96 
the apparatus to be used in the observa¬ 
tions of the approaching transit of 
Venus. Title only . i 102 
the transit of Venus in 1874. Communi¬ 
cated by A. Hall. Abstract . ii 32 
the methods of measuring the inequali¬ 
ties of the pivots'of the transit instru¬ 
ment. Title only . ii 68 
the voyage of the U. S. S. Swatara. No 
abstract . ii 68, 69 
the velocity of light and determination 
of the solar parallax. Title only . ii 201 
the color corrections of achromatic ob¬ 
jectives. Abstract . iii 39 
the number of lenses required in an 
achromatic objective, consisting of in¬ 
finitely thin lenses in contact, in order 
that, with any given law of dispersion 
whatever, the greatest possible num¬ 
ber of light-rays of different degrees 
of refrangibility may be brought to a 
common focus. In full . iii 65 
the solar corona. Abstract . iii 116 
the relative accuracy of different meth¬ 
ods of determining the solar parallax. 
Reference . v 39 
the monochromatic aberration of the 
human eye in aphakia. Reference, 
vi 5 
flexures of transit instruments. Ab¬ 
stract . viii 27 
