146 
Page. 
Harkness, William, communication on—Cont’d. 
the progress of science as exemplified 
in the art of weighing and measuring. 
Presidential address. In full....x xxxvii, 39 
a device for viewing the sun by light of 
any desired wave length. Abstract...x 
the representation of comet orbits by 
MOdelS. Reference... sececereescseeee “ete < 
the constant P in observations of terres- 
trial MagnetiSM......cecceeeers 
13 
28 
ee se secene scenes x 102 
remarks on the black drop.........+ csebabseva ii 199 
results from photographs of the transit 
of Venus..... 
vital force........ SadRuuEvadsssussoheavsaceseh=s seevaee v 105 
temperature observations........ Seceeseevas Wk 
NYZrOMEtry.....e.eeeee cneevee Rech byauvenssranEnd vi 
ZIAcCie?S ...... 0000 
vision......... PEOPLE 
problem in probabilities......... 
Harper’s Ferry, Fault near ......s..ssereeeree avi 
serene cescs eee 
26 
36 
30 
Hart, A. S., cited on Malfatti’s problem..ia 117, 119 
Harting, cited on mineral aggregates...... ili 
Hartley, J., Solution of a geometrical prob- 
LGYI2) OY sirasccancowasdcnanenevasccaass SakaeEs a veouseREh 
Hatteras, Geology of Cape...... NonsuetereessersceN& 
Hausen, C. A., cited on nerve currents...... v 
64 
28 
Hauy, Cited on MineralOgy....ccescerneeeeeeeeed 77, 78 
Havana magnetic disturbance and north- 
Hawaiian geology ...ccccccrseceerseeee paceneunens Pee | 
Hayden, Everett, communication on the 
Charleston earthquake. Abstract. 
AVIOD scasunssseuessues Sitbvsonescaurncsascunvancarennyra ks 
Hayden, F. V.,cited on base-line methods..4it 
Hazen, H. A., communication on the retarda- 
tion of storm centres at elevated sta- 
tions and high wind as a probable 
38 
34 
cause. In full .......0 ecuaaneemeneuterssene v 108 
the coming winter of 188283. Ab- 
SUPUCE, «cteanansounanese Aton Gnokiceesebscguyeseee v 122 
hygrometric observations. Abstract...vi 
thermometer exposure. Abstract......vi 
thesun glows. Abstract and reference..wil 
thermometer exposure. Abstract.....wil 
thunderstorms of 1884. Abstract......wili 
the condensing hygrometer and sling 
psychrometer. <Abstract....... seveeeee WALL 
effects of solar radiation upon thermom- 
eter bulbs having different metallic 
LOVETINGS. ADSEACE ...cceerereeesererererve dX 
the sky glows of 1883. Title only..........X 
felation between wind velocity and 
PTOSSUTE. REference....se.seccemeseressceeeeeK 
remarks on deflection of rivers............Wii 
36 
10 
24 
Heats, Molecular.....sceccccceeee 
Hell Gate explosion......se.seeseceeere sesceeees WALL 28 
Hellmann, Dr. G., bibliographic work in 
Helmert cited on alignment curves.... 
Henry, Joseph, Address on the life and char- 
PHILOSOPHICAL SOCIETY OF WASHINGTON. 
Page. 
Hazen, H. A., remarkg on—Cont’d. 
. Weather prediction........cccccssrsseeeees Wid 9 
Care Of pamphlets.........ccccccssrcsseeee WHEL 29 
REVOPUMICH i cractcccscscsecsseses Soccosscacisacsasheaseemer mes 
WING! “VANIORScrrtaeecccccsesse cadeeradeee 
the sparrow question ........... actoeeaee otek eG 
Hazen, W. B., bibliography of meteorology 
x 21 
Death of....... aaptapantreaeaeen scesaceetonnaee Gescsrecuraaea ae 
Heatiof (Ne Stn icc... ..ccccssscsercanesssbenasentansenneene i 31 
THeOry Ofiicscesepusctessesseee cree seaneaxaaacan; Se 
sucodes succeat neh uasenen aba 
MCtCOTOlOZY....ssccerseeeesere serene 20, 21, 23, 25 
wi 124, 126 
CECT Ol scscesscesscrecass svcseesececeeeed 203, 368, 370 
cited on a telephonic experiment...........44 104 
adhesion and cohesion......... dcccceveteanpans Lou 
land and S€a DIe@ZeS.....csccereceeseseceecees wv 29 
sound anomalies....... 11 58, iv 135, wv 33, 40, 43 
the Philosophical Society................ Pesce Sth 
Washington as a scientific center......... = 47. 
communication on phenomena of sound 
and primes with arg forks. 
Title only... oto eseescenen tocenpeegaaiee 
observations maiaaele ona jouer to Cali- 
fornia. Title OnMzy....cncccvscnvessere Ses seaman i 31 
the organization and objects of the So- 
ciety. Presidential address. In full, 
iv, 34 
the life and scientific labors of the late 
Alexander Dallas Bache. Reference...4 35 
the expenditure of the income of the 
Bache fund for 1872. . Title only.........4 
the fluctuations of the river Nile. Title 
the condition of the Society. Vo ab- 
stract... 
sound in volanan to foe eipalae ‘teeta in- 
vestigations under the direction of the 
U.S. Light House Board. Jn full......1 65, 
ii (45) 
atmospheric electricity. Title only....4 75, 87 
experiments on fog signals during the 
past summer. 
a method of developing magnetism in 
barsof steel. Title only.......... acoseesiauk! (OM 
meteor trains, and the upper atmos- 
pheric currents, ttle only.........004 98 
Giffard’s injector. 
AUCition. Title only....cccccccecscosecrcesre Ad 22 
the glacial theory. Abséract...............4 35 
fog signals and abnormal conditions of 
SOUNA. Referencé...ercrccccsrscssrerecsrccsrordh 37 
53 
ONLY ...0000+ Seeoceense cocescewes sas cveessbeeueacaeueeaet i 63 
64 
Title Only.c....cccceeees eevee 90 
Title Onl y......0crccveeeed 99 
