66 
Page. 
Doolittle, M. H.: communication on cause 
and chance in the concurrence of phe- 
NOMENAL....eseee aveavuvaseweane Wavesosknuecnsersienouecs . 54 
— remarks on bisection and sesquisection... 52 
— —— notation for gravitation formula....... 40 
Dutton, C. E.: communication on practical 
geology versus speculative physics....... «4,0 
— remarks on transmission of sounds and 
Carth trEMOTS.....ccccccceeeceeee pcuseankudaccasnepene . 28 
Earth, Interior of........... feseares mrureyete edgeenstdvans 7 
Earth’s cr ust, Crumpling Of.......s0-+eeees sees 18 
Elliott, E. B.: communication entitled Ex- 
ample illustrating the use of a certain 
symbol in the calculus of affected quan- 
TG Yirve sense Syagavesvessaciey Gattvesueessere Reecaed 
Endowment of research ; 
Example illustrating the use of a certain 
symbol in the calculus of affected quan- 
tity (Title Only)....cccercecccesssccscceesnees Lieake a 37 
Farquhar, E.: remarks on the recognition 
of the direction Of SOUDG......cccesceccsereeees 13 
== —= — THUNGOFSHOLMSsscesccsvecsccssiverssescnsesevera LL. 
Farquhar, H.: remarks on sounds connected 
with meteors and earthquakes 28 
Feuerbach’s Circle............cceeseessecees 45 
Flexures of transit instruments.... 27 
Flood Rock explosion......... waeitetonsusdeessuceyrecd 28 
Flora of the Laramie group (Title only)....... 17 
General Committee, Members Of............. xiv, XV 
— — Rules Of.....sscsceeeeeeeee aocecchdvasheusancaduauseses xii 
— government in its relations to research... xli 
Geometry, Grassmann’s system Of.............++ 53 
Germ Cultures......-scesceeeeee Souebhsaionguyancsaelneenneys 30 
Gooch, F. A., Election to membership of...... 5 
Goode, G. B.: communication on the syste- 
matic care of pamphlets.........0.:ccesseereenee 29 
Grassmann’s system Of ZCEOMECETY......c.ceeceeees 53 
Gravitation, Modification of Newtonian 
PODIUM AsO. clase caccatansveseenssuns ss supemntceate crass 39 
Group of circlesrelated to Feuerbach’scirele 45 
Hann, J., cited on temperature changes at 
Hamburg...... scehopwuehunaavstenecsiascnessccuunnsspeds 9 
Hains, R. P., Election to membership of...... 10 
Hall, Asaph: communication on variations 
OF TAtitUGelice.vsecsesescusmaresesns vonons Rahitacaecaceck 10 
— Presidential address , «-XXXiii 
— remarks on a communication by Mr. Dut- 
GOD. scecccnsecconcssccvssccecacavcesecsvessssscessetaveanases 8 
—— — field-time determinations........e. eee 58 
— — — Hamilton’s geometric system........... 53 
Hall, Asaph, Jr., Election to membership of. 3 
Hall, Prof. G. Stanley: communication on 
recent experiments on reaction time 
and the time SONnSC........eeeeeee aeipirenae siete 
PHILOSOPHICAL SOCIETY OF WASHINGTON. 
Page. 
Hallock, William, Election to membership of, 
Hampson, Thomas, Election to member- 
SHAD Of ...csccsseosocsseves anvevosroees=esenauiaeapemnineme 
Harkness, William: communication on flex- 
ures of transit instruments...... 
— remarks on care of pamphlets........... aaveani 
Hazen, H. A.: communication on the con- 
densing hygrometer and sling psychro- 
MOLCMs.. ..ccscce oss ocssopnaenseus seseneuen bsaonmonesheaea . 
— —— thunderstorms of 1884........0cccccceseeee 
—remarks on the verification of weather 
PVOMICHONS ss5i. eke. cassteesbaceds dvameenere sane 
Hill, G. W.: elected President of Mathantake 
ical SGeti ON. ...6243 .iccivesenvacsuedsdeatneeeesthaeeee - 
— remarks on adjustment of conditioned 
ODSeYVatlOns.c.tvscccvessusassevensees ad cuscaeeaeeneee P 
—— — geometric systemS..........0.. 
— — — MeYcury.........ceceeeeeeeees a-cwabcaasheeeneneenee 
— — — notation for gravitation formula...... ° 
Hodgkins, H. L., Election to membership of 
Hoaorary members of American Societies 
5 
29 
27 
29 
XXXVii 
Hough, F. B., Death of.... 
HY ZTOMCteT Sis csvecsecsenst succes scsnnnsseeaae oii daveaweny ° 
eRe ee eee eee neewen eee eneeee 
Iddings, J. P.: communication on the col- 
umnar structure in the diabase of Or- 
ange Mountain, IN. J. .cs.sccevcuscvebsenesneacenen 
— Election to membership Of...............e0cee06 : 
Infinite attraction of a finite Mass... r 
Javal and Schiotz ophthalmometer, Exhibi- 
TION OF. 0.005 ccceccdscuscsncsesdecceseneeendeneteeneeeeuee i 
Johnson, A. B.: communication on the diffi- 
culty in determining the direction of 
25 
25 
19 
11 
SOUND, sovces csvect savcadevedan cddphestaamne eae Gate 11, 12 
Kerr, W.'C.,, Deathiofvcisstetetsssteasstnnaienenenetene 
Kummell, C. H.: communication entitled, 
Can the attraction of a finite mass be 
TD AINIbC 7...000.0tsevaverseicesons<wananhteaaehueaeeeneeeeeee 
— ——an artifice sometimes useful for the 
adju@ment of conditioned observations. 
— remarks on distances on any spheroid...... 
— — — Feuerbach’s CIrcle.....cccccsssese eneceeseeee . 
— — — field-time determinations...... 
Latitude, Variations Of......... sss PA 
Listiof MOM DeLBi secsacccare: evacsnsussuatansesisnepeeteeye . Xvi 
Mann, B. P.: remarks on the care of pamph- 
Marvin, C. F., Election to membership of..... 
Mathematical communications, Committees 
— Section, Bulletin Of. cds eocduuce danabe athqa erent 5 
—= — Mombers) Of,.....02.ccucsnavenssseatsavadaanvaenep " 
0 a | 
