INDEX TO VOLUMES I-X. 
173 
Page. 
Todd, J. E., remarks on charcoal in the 
drift.iv 122 
Toner, J. M , communication on a method 
of describing aud locating with ease 
the approximate positions of geo¬ 
graphical regions. Title only .i 97 
the burning of theatres and public halls. 
Reference .li 95 
a malformed dog. No abstract .ii 185 
earth vibrations at Niagara Falls. Ab¬ 
stract .iv 186 
coins and medals. Abstract .v 22 
remarks on care of pamphlets......viii 29 
Tonto Sandstone, Age of.i 109 
Topaz from Stoneham, Me.viii 5 
Topographic map defined. x 11 
types in the southeastern States.ix 22 
Topography and geology of the Cross Tim¬ 
bers of Texas.x 6 
and structure. x 7 
defined.x 14 
Topophone.viii 12 
Tornado at Rochester, Minn.vii 3 
Torreya in Southern States and Japan.ii 42 
Townley, R., cited on transmission of sound, 
V 42 
Transit flexures. viii 27 
Meridian.viii 55 
of Mercury.....ii 199 
Mercury, May, 1878.iii 43 
Venus, 1874.i 63, ii 31, 33, iv 168 
Venus, 1882. vi 21 
Trap of Orange Mt., N. J.viii 24 
. Treasurer’s report. v 176, 180, vi xii, vii xxiv, 
viii xxviii, ix xxx, x xxxiv 
Tremors detected by astronomical observa- 
tions. 
.iii 
120 
Triangle, Formulae for the area of. 
..viii 
37 
Problem concerning. 
.iii 
55 
Trisection of angles. 
96 
Trouvelot, L., Drawings of nebulae by.. 
.ii 
51 
Tucker, R., Solution of a geometrical 
prob- 
lem by.. 
.iii 
65 
Tupman,-, letter on solar eclipse. 
Com- 
municated by W. Harkness. No ab¬ 
stract .i 56 
Twining, W. J., Death of.. v 102 
Tyndall, John, cited on photophonic experi¬ 
ments.iv 152 
sound anomalies.v 33, 41 
heat absorption by the air.v 94, 96 
Introduction of. i 65 
letter on fog signals. Communicated by 
J. Henry. No abstract .i 91 
,iii 106 
Pago. 
Unalashka volcanic sand .vii 33 
Unification of longitudes and time. vi 106 
Uniform itarianism. viii 6 
United States, Centre of population of. i 35 
Geographic centre of.. i 22 
Urara. v 62 
Uranometria Argentina. iii 122 
Uranus, Satellites of. i (30) 
Utah, Glacial epoch in. i 84 
Permian formation of.. iii 68,105 
Ute language. ii 28 
Vacant offices. Filling of.. ii 84, iii .53, v 112, 
vi 41, vii 36 
Valentin, cited on mineralogy. i 77 
Valleys, Classification of... i 49 
Values at different times. ii 87 
Relative, of gold, greenbacks, and silver, 
ii 52 
Van Sant,-, communication on a method 
of lighting gas-jets by electricity. No 
abstract .i 56 
Variations of latitude .. viii 10 
Vauquelin, cited on mineralogy. i 78 
Velocity of earth tremors. viii 28 
earthquake waves. ix 41, x 17, 28 
Venom of serpents.^. vi 38 
Ventilation of the House of Representatives, 
V 99 
Venus, Transit of, 1874. i 63, ii 31, 33, iv 168 
1882... vi 21 
Verification of weather predictions. vii 122, 
viii 8, X 83, 94 
Vertebrse, Cephalic. i 26 
Virginia, Fossil plants from.ii (26) 
Visible speech.....iv 55, vi 53 
Vision.vii 72 
Apparatus for testing.iii 53 
Vital principle..i 27, v 50,102 
statistics of the tenth U. S. census.viii 4 
Vocabulary of an individual.ii 28, (16) 
Volt-meter.viii 26 
Volcanic dust in the Great Basin.vii 18 
necks.vii 78 
problem. The.vi 87 
sands.vii 33 
Volcano, Latest, in northern California.. . ix 46 
Volcanoes of New Mexico.vii 76 
Von Cronstedt, cited on mineralogy.i 78 
Von Jherling, Dr. H., cited on the Chito- 
nidae.ii 193 
Vortex motion.iii 143 
Vulcan, Search for.ii 85 
Wagner, cited on the sun’s diameter. i (4) 
Waite, Chief Justice M. R.,letter announcing 
the death of Joseph Henry. ii 196 
Uinta Mountains, Permian rocks of. 
