174 
PHILOSOPHICAL SOCIETY OF WASHINGTON. 
Page. 
Walcott, C. D., communication on the Cam¬ 
brian system in the United States and 
Canada. Abstract. \figure .vi 98 
the geologic age of the lowest formation 
of Emmons’ Taconic system. Refer¬ 
ence . X 5 
Discovery of Permian fossils by.iii 68,105 
Wallerius, cited on mineralogy.i 78 
Walling, H. F., communication on topo¬ 
graphical indications of a fault near 
Harper’s Ferry. Abstract .vi ^0 
Ward, Lester F., communication on the nat¬ 
ural system of plants. Title only..H 186,187 
the origin of the chemical elements. 
Title only .iii 33 
animal population of the globe. Abstract, 
iv 27 
• field and closet notes on the flora of 
Washington and vicinity. Abstract..i.-v 64 
the organic compounds in their relations 
to life. Title only .v 91 
some physical and economic features 
of the Upper Missouri system. Refer¬ 
ence . vii 20 
the flora of the Laramie group. Refer¬ 
ence .viii 17 
the frequency of coincidences. Abstract, 
X 8 
the geographical distribution of fossil 
plants. Reference... .x 28 
remarks on vital force.v 105 
Dismal Swamp.vi 30 
deflection of rivers.vii 23 
Indian observation of nature.vii 74 
care of pamphlets...viii 29 
Warren, G. K., cited on abnormal phenom¬ 
ena of sound. ii (48) 
communication on the geological history 
of Lake Winnipeg. Abstract .ii 27 
Warner, A. J., communication on the silver 
question. Abstract .Iii 112 
Wasatch Mountains fault.ii 103 
Growth of.ii 195 
Washington a scientific centre....i xi, viii xlvi, 
X 47 
Flora of.iv 64 
Watershed of the Adirondack region.ii 67, 82 
Waterspouts in North Carolina......ii 104 
Watson, J. C., communication on the discov¬ 
ery of new planets having especial ref¬ 
erence to the asteroids. Title only....I 53 
Watson, Sereno, cited on the Great Basin 
flora. iv 99 
tho classification of plants.iv 108,110 
Wave lengths of light.v 142 
Waves, Earthquake.x 17 
Page. 
Waves, molecules and atoms.i 66 
Weather forecasts..v 122, viii 8 
Webb, Capt., cited on phenomena of sound, 
ii (49), (50) 
Weiss, Prof., cited on mineralogy.i 78, 79 
Welling, J. C., communication on the life 
and character of Joseph Henry. In 
full . ii 203 
anomalies of sound signals. In full .v 39 
the atomic philosophy, physical and 
metaphysical. Presidential address. 
In full .vii xxix, 81 
eulogy on Gen. A. A. Humphreys. Ab¬ 
stract .vii 4 
remarks on vocabularies.ii 28 
drifting buoys.vii 15 
Indian observation of nature..’...vii 75 
Wells, D.'A., cited on medium of exchange, 
iii 101 
Wenham, cited on microscope apertures..iii 19 
Werner, cited on mineralogy.i 78, 79 
Wernich, cited on contamination of air by 
sewage.iv 38 
What is a glacier ?.vii 37 
Wheatstone’s microphone, Modification of, 
iv 183 
Whewell, Dr. W., cited on attraction.v 161 
Greek philosophy.vii xxxviii 
White, C. A., cited on the loess of Iowa.iv 121 
communication on the evolutional history 
of the North American TJnionidce. 
Title only .ii 181 
asymmetry in the form of the human 
cranium. Title only ......ii 190 
the fresh-water shell heaps of the in¬ 
terior rivers of North America. Title 
only . iii 32 
the subject of the Permian formation in 
North America. Abstract .iii 104 
artesian wells on the Great Plains. Ref¬ 
erence .V 101 
remarks on the relations of plants to 
geology.iv 119 
loess of the Mississippi valley..iv 122 
teredo. .v 99 
theory of permanence of oceans.vi 93 
drainage system of Iowa. vi 97 
White, Prof. I. C., Discovery of Permian fos¬ 
sils by.iii 105 
Whitfield, R. P., Observations on Limnsea 
by.iii 75 
Whitney, Prof. J. D., cited on geology of 
Great Basin.i 56 
Whitney, Prof, W. D., cited on individual 
vocabularies.ii (19) 
Wiebe, H. F., cited on thermometry.ix 26 
