INDEX TO VOLUMES I-X. 
133 
Page. 
Doolittle, M. H., communication on—Cont’d. 
association ratios. Abstract . x 93, 94 
remarks on sesquisection. viii 52 
gravitation formula. viii 40 
phonetic alphabet. ix 19 
bi-metallism. iii 103 
the need of a biome er. v 105 
binary arithmetic. vi 39 
Dorsey, J. Owen, communication on the 
gentile system of the Omahas. In full. 
3 figures . iii 128 
Drainage system and loess of eastern Iowa, 
vi 93 
of the Black Hills.iii 125 
systems.i 49 
Draper, Prof. J. W., cited on photographJ^..i 47 
radiant energy.v 135 
Dreams in their relation with psychology..vi 37 
Driftless region.vi 94 
Drift of Iowa and Nebraska.iv 120 
Dry painting of the Navajos.viii 14 
Duane, Gen., cited on fog signals....v 32, 43 
phenomena of sound.ii (49), (50) 
Du Bois-Raymond, Experiments in animal 
electricity by.v 57, GO, Cl, 02 
Dudley, P. H., communication on the uses 
of the dynagraph, and the work per¬ 
formed in determining the resistance 
of trains, etc. Abstract .iii 29 
Dulong and Petit, Law of.v 139 
Thermometrie experiments of..v 91, 93 
Dumbness of deaf children.vi 48 
Du Pr6, Warren, cited on earthquakes.i 101 
Dutton, C. E., communication on the meas¬ 
urement of the pressure developed by 
the explosion of gunpowder in fire¬ 
arms. Title only .i 52 
some recent experiments on different 
kinds of gunpowder at Fortress Mon¬ 
roe. Title only .i 54 
the causes of the elevations and subsi¬ 
dences of the earth’s surface. Title 
only.. ......“!..i 74 
geological time. Title only .i 89 
Mallet’s theory of the formation of the 
physical features of the earth. Title 
only.. .i 90 
recent improvements in the economy of 
fuel. Title only .i 96 
recent improvements in the manufac¬ 
ture of steel. Title only .i 97 
the chemistry of the Bessemer process. 
Title only .i 98 
the glacial period. Title only .ii 26 
the causes of glacial climate. Abstract, 
ii 43, 45 
Page. 
Dutton, C. E., communication on—Cont’d. 
the geological character of the Colorado 
river. Title only .iii 28 
the succession of volcanic eruptions. 
Title only .iii 36, 37 
the Permian formation of North Amer¬ 
ica. Abstract .iii 65, 67 
the silver question. In full .iii 78 
the scenery of the Grand Canon district. 
Title only .iv 120 
the Vermilion cliffs and the valley of 
the Virgen in southern Utah. C. E. 
Dutton. Title only .iv 122 
the geology of the Hawaiian islands. 
Abstract .vi 13 
the volcanic problem stated. Abstract, 
vi 87 
What is a glacier ? Abstract .vii 39 
the volcanoes and lava fields of New 
Mexico. Abstract .vii 76 
practical geology versus speculative 
physics. Title only . viii 4, 5 
a recent visit to the scene of the Charles¬ 
ton earthquake and resulting conclu¬ 
sions. Title only .x 16 
the depth of earthquake foci. Abstract. 
• 1 figure .x 17 
the speed of propagation of the Charles¬ 
ton earthquake. Reference.... .x 28 
remarks on distribution of volcanic ac¬ 
tion.i 102 
wind and temperature observations.ii 18 
refraction of sound.ii 58 
geology of the Colorado region.ii 76 
the earth’s interior.ii 77 
charcoal in the drift.iv 122 
separation of minerals by density.vi 27 
nebular hypothesis.vi 45 
temperature observation.vi 48 
outlines of continents.vii 24 
sun glows. vii 35 
Indian observation of nature.vii 74 
earthquake detonations.viii 28 
Charleston earthquake.ix 42 
Dynagraph, The.iii 29 
Dynamic hypothesis.vi xxx 
theories of force.v 126 
Eastman, J. R., cited on individual vocabu¬ 
laries. ii (21) 
communication on a comparison of the 
thermometers used to determine the 
correction for atmospheric refraction 
at the U. S. Naval Observatory. Ab¬ 
stract . i 68 
