118 
Page. 
Acoustics, List of papers on—Continued. 
the telephote. E. B. Elliott. Abstract...i& 192 
musical intervals. E. B. Elliott. Ab- 
SEPOCT...000 Mavala ihecsestsNisubsrensesevesessncedened ii 199 
binaural audition. A.G. Bell. Abstraet.Adi 68, 69 
the spectrophone. A. G. Bell, In full. 
a 
upon a modification of Wheatstone’s mi- 
crophone and its applicability to radio- 
phonic researches. A.G. Bell. Jn full. 
recent investigations by the Light House 
Board on the anomalies of sound from 
fog-signals. A. B. Johnson. In full. 
Baap ey Li figuyressevavcstserssavenasacdsuschacncate vi 23 
anomalies of sound signals. J.C. Welling. 
Upiifutllcusavenencsasesdnacteoeacesvaetesse sevens ceeett v 39 
the difficulty in determining the direction 
ofsound. A.B.Johnson. Abstract.-wiii 11, 12 
the mechanism of “clicks” and “clucks.” 
Ay G2» Bell. .Ditle only: ticicestecceseeess vili 18 
Action at & GiStaNnCe........cecececsscescccessassssses ~v 156 
Adams, Prof. Carl, cited on Malfatti’s prob- 
lem ...... Dbasbusssnenacsieie eebeewonee sebebnascnentee ii 118 
adams, Prof. W. G., cited on electric resist- 
ANCEvsiasherees shavdeGhabcvsphtssishecroneetesaseabt iv 154 
Address of chairman of Mathematical Sec- 
TION 2.200005 Rusdatemavessines Peschucusenenadeenenerck vi 117 
of President Beare VST lisvecesserseacanscceaes iv, 34 
Henrys US7TGiecccens-scse se gch Sevaugnsecaadtecnarat ii 60 
TOM ys L877 pecvsccstecustasscevasssestpeceveeeecees ii 162 
Newcomb, 1879... ..ccceccccoseceeeoee aude cnessaeen did 52 
Newcomb, 1880... 
Woodward, 1881.. 
Taylor, 1882........ 
Powell, 1883 ............. Sbskedpeberes WA KRVTI, 10 
Welling, 1884... wii xxix, 81 
a pA S86 ycesstsweccncrecccstaen eee Wiki x xxiii, 30 
IBIS CSGiscssencts ese csseceescnns serene ix xxxv, 46 
Harknege: DSSTide. aiicneecsseussesceeneus x xxXvii, 39 
of retiring president, Resolution concern- 
ADs evens Sercesonessos BubavsvcteastadsstwavaxeenueeeT iv 30 
on the life and character of Joseph Henry, 
44 203, 368, 370 
Adhesion and CoheSion............ssessessereeeeneee v 136 
Adirondack region, Proposed reservoirs in 
CBs. cceikevwane spent ecw seetueteccessalaueccersdssnves ii 67, 82 
Adjustment of conditioned observations, viii 41 
Of tHE CAVED ATs, neq cayentewewewascatssccaesdasnnesra: ii 59 
Administration of scientifie work ........... ix xliii 
Adulteration of food........... Bei avlack dana sehousens iv 39 
Aerolite. See Meteor. 
Agassiz, Louis, Announcement of oath of.i 93 
Resolutions on death of....... pavawsuateesenacarnr A 95 
Agricola, Georg, cited on mineralogy.........8 77 
Ague, Conservative function Of.....ccseeece 5 
PHILOSOPHICAL SOCIETY OF WASHINGTON. 
Air, Contamination Of ccccicsccovsssnessccstseceare iv 37 
Alaska, Discoveries in’....... 
Glaciation in....... 
Results of envels 3 in.. 
Value to the United States ofa, iesecsagehneeeaen 
Alaska-Siberia boundary .......0. cesssseeceeeee iv 123 
Albertype process of photo-engraving........l 42 
Aleutian Islands, Shell heaps of.............00+ ii 65 
Alexander, Stephen, communceation on the 
zodiacal light. Read by J. E. Hilgard. 
En: full, 9: fig“ures ics cosssccoeseced ocakeeied 1105, (19) 
Algebra, Logical 
Algorithm of the arithmetico-geometric 
INOS gaanecasbauecacessnaeecsase aspteuprearemraatey vil 102 
Alignment curves on any surface............. vi 123 
Allard, M. E., cited on the light-house service 
of the United States................sssssss 
Alluvial basin of the Mississippi.... 
Alphabet, PHONG :....<cs:<00cseesseoctuesaseeenners 
Altitude of the Caspian and Aral seas........ ii 34 
Altitudes deduced from combination of rail- 
road levellings........ ccnp dsteseusteeenpeannaeal fi 23 
Alvord, Benjamin, cited on gravitation form- 
Ti iscecccenne sss sseunacilasaessetsgueaaeeraaane sees Wild 40 
communication on the habitability of the 
elevated plateaus of the west. Title 
ONT cs tivcasesrnke Soucuclaveousvevenadueue eeeeeeeEeeeeae i 74 
the recent earthquakes in North Caro- 
lina.) Abstract ..22..:<.0hessscanenceseaeeaaeeeee 1101 
the mortality among army officers. Ref- 
EN ENCE... ovwucvaccnacosdsbucucsstes ten isaseeeeennannaane ii 49 
proposed governmental insurance. Wo 
ADSETACE.....2-..00000 BEERS eeeeecrecocin cn caseaus ii 49 
a trigonometrical formula. Title only...ii 104 
the intersection of circles and the inter- 
section of spheres. Title only.......... Ai 198 
new points respecting the intersections 
of circles and the intersections of 
spheres. Title ionts).scscvccecanaesenteeeeeee Ad 201 
life and work of Joseph Henry. Jn 
fils snanscacsosansyoesdenenasaaee sap vaserarese pan aacent ii 370 
a curious fallacy as to the theory of gray- 
itation. In full.....\..cccscavessoncusuureenenenen ve 8 
some of the properties of Steiner’s power 
Circle. Title Onltfissccconscasnadetvesevaeseeeeae 
the compass plant. Reference 
aspecial case in maxima and minima. 
ADSEr Obi accceciicoans eocesusdvseceiangukeeaeneeene wi 149 
Death Ofise..edsincsmeene scbeedeeeet vii 72, 127 
List of mathematical papers by........... -vik 128 
Memorial tO. ..cccuaeccsssccvaresees deapsteratureanes wii 127 
remarks on Lake Bonneville... shtiee ed MOS 
Benjamin Peirce... 
Arkansas bonds..........+ 
agricultural colle ges..........ccccsecccee sees: wi 106 
Amendment to constitution.............. ix 47,x 39 
