174 PHILOSOPHICAL SOCIETY OF WASHINGTON. 
Page. 
Walcott, C. D., communication on the Cam- 
brian system in the United States and 
Canada. Abstract. 1 figure... vi 98 
the geologic age of the lowest formation 
of Emmons’ Taconic system. Refer- 
ENCE. 00 dadeveweead atone duaddddeddsetcsccsdadaacenses eG tb 
Discovery of Permian fossils by......... iii 68, 105 
Wallerius, cited on mineralogy...... aber vecasteee i 78 
Walling, H. F., communication on topo- 
graphical indications of a fault near 
Harper’s Ferry. Abstract...... watatees vi 30 
Ward, Lester F., communication on the nat- 
ural system of plants. Title only..di 186, 187 
the origin of the chemical elements. 
Title only ....0+ Redcaees Peperecee pene SeArencererc. iii 33 
animal population of the giobe. Abstract, 
iv 27 
field and closet notes on the flora of 
Washington and vicinity. Abstract.iv 64 
the organic compounds in their relations 
to life. Title Only ...1.0ccececcssseansesssonasesW OL 
some physical and economie features 
of the Upper Missourisystem. Refer- 
GNGE. seccascccencsnese eeuswomaKens ihexeccaenaeiassha vii 20 
the flora of the Laramie group. Refer- 
ONCE .ucrcnee ais huantiasauesie st cescespen saaakaet dns viii 17 
the frequency of coincidences. Abstract, 
Kas 
the geographical distribution of fossil 
plants. Reference... 
remarks on vital force 
Dismal Swamp.......... 
deflection Of riverS...........ccccesceeseeees ree 
Indian observation of nature............. vii 74 
eare of pamphlets....... Acbecobrocerecee sess Will = 29 
Warren, G. K., cited on abnormal phenom- 
BH AOL/SOWH AL caccrccatcastesscisnareangivs seanes ii (48) 
communication on the geological history 
of Lake Winnipeg. Abstract........00 ii 27 
Warner, A. J.. communication on the silver 
question. Abstract.......0 easeesa/sverusen iii 112 
Wasatch Mountains fault......ccceeesseers aiteseas ii 103 
Growth Of ..........000 ScavaduedsensseeneeTsAe ne beneh ii 195 
Washington a scientific centre....i xi, viii xlvi, 
x 47 
Flora of....... ide eens Minvks dteucteans opeuusncnescevarane iv 64 
Watershed of the Reiponrasi region......Ai 67, 82 
Waterspouts in North Carolina... ..... cecceccesh 104 
Watson, J. C., communication on the discov- 
ery of new planets having especial ref- 
erence to the asteroids. Title only....4 53 
Watson, Sereno, cited on the Great Basin 
ON risesecmeaueiass-vovassesevscncamersnccresneke iv 99 
the classification of plants............4W 108, 110 
Wave lengths of light......cscscssrecsessecseree sence wv 142 
Waves, Barth quakes scavsncvcsesssesevecssctescsocrcere > a by 
Page. 
Waves, molecules and at@ms.........ccceseeseeeees i 66 
Weather forecasts......ccsscsssseesescceses ‘v 122, vidi 8 
Webb, Capt., cited on phenomena of sound, 
ii (49), (50) 
Weiss, Prof., cited on mineralogy............4 78, 79 
Welling, J. C., communication on the life 
and character of Joseph Henry. In 
fll sasaavaveessadtsoueen acus lat iscnaestesenie otouanepem ii 203 
anomalies of sound signals. Jn full.....w 39 
the atomic philosophy, physical and 
metaphysical. Presidential address. 
Tv full cvercsess Aroorrrtrecort: etoues vii xxix, 81 
eulogy on Gen. A. A. Humphreys. Ab- 
SUPACE cvccassun scdvev veces evauvasesdecudcuves tanner vii 4 
remarks On vocabularies. ..........ssscee coos fi 28. 
Grifting DUOVS..,.ccccevss,sseveesancsssnadeeenen wii 15 
Indian observation of nature............. vil 75 
Wells, D. A., cited on medium of exchange, 
hii 101 
Wenham, cited on microscope apertures..iii 19 
Werner, cited on Mineralogy..........c00 cree i78, 79 
Wernich, cited on contamination of air by 
SOWALO iccacsecaasahev des kaandonawuerati eva ndecane iv 38 
Whatiis'a glacier ?t:.2i.c22 Saesseswerncueutensemeat wii 37 
Wheatstone’s microphone, Modification of, 
iv 183 
Whewell, Dr. W., cited on attraction..........W 161 
Greek philosophy.............0000+ see Whi XXXxVili 
White, C. A., cited on the loess of Iowa.....iw 121 
communication on the evolutional history 
of the North American Unionidee. 
Title only...... sodscechsdeadseaasseddtvnaseuceenete ii 181 
asymmetry in the form of the human 
cranium, (Z2tle Onlys..ccacovsscetoners ae ii 190 
the fresh-water shell-heaps of the in- 
terior rivers of North America. Title 
the subject of the Permian formation in 
North America. Abstract...........0+ .-did 104 
artesian wells on the Great Plains. Ref- 
CV CUCE a cascacesaencennsessnpawe osececcuncawupausepenes v 101 
remarks on the relations of plants to 
LCOLOLY.....ecseeeeeee dvsesee)ischeust one usesaneash iv 119 
loess of the Mississippi valley........... «iv 122 
VETOED. ....00..eccee0 enaaie sabe horanedyarsl annie debsecansWp 09) 
theory of permanence of oceans......... vi 93 
drainage system of Iowa........4 oo -decuassewenn oO) 
White, Prof. I. C., Discovery of Permian fos- 
sils by........ anacdtecasconeeeee doveocoeveusnastuna ey LOG 
Whitfield, R. P., Observations on Limnea 
Diyas sch esectuck bunetes wacutdaleeten ea ants 
Whitney, Prof, Je Di; cited | on geology of 
Great Basin.......... edaauedeaenohe doceususssstoneaena 
Whitney, Prof. W. D., cited on™individual 
vocabularies....... ined chuaucaneeecasadadaeyeents ii (19) 
Wiebe, H. F., cited on thermometry......:..4x 26 
