148 
Page. 
Hilgard, J. E., remarks on—Cont'd. 
persistent observation of phenomena..ii 19 
vocabularies ........eces Gaccsne is eopsanounseh Medea fi 28 
calendar reform........++++ 30 
photographs of the sun... 33 
cause of glacial climate...........sseeseeere Ai 36 
a new meteorological instrument........ ii 64 
Dakota Calendar.......-ccccorcsvesecccccnsccceeces fi 92 
Peirce’s Linear Associative Algebra...iv 24 
unification of longitudes and time...... vi 109 
Hilgard, Theodore, communication on the 
number of the cephalic vertebre. 
Reference... ..csaeeaseecesenersseenes cccsee sncesoes i 26 
Hill, G. W., communication on certain pos- 
sible abbreviations in the computation 
of the long-period perturbations of 
the moon’s motion due to the direct 
action of the planets. Abstract and 
TOPEP ENCE. ...ceecee weecceenersnncrenscessoncnnones vi 136 
a formula for the ler zth of a seconds- 
pendulum. Reference........ oases -vii 101 
a problem in probabilities. Abstract..x 88 
the motion of Hyperion. Abstract and 
TEPOTONGCE::.ccsssvsenuastuenessssserssnndnendessgpesseX OU) 
the tuiceren on of differential Ee aotlons 
admitting periodic integrals. Abstract 
ANA TEFSETENCE.....rccerrerecescrsesserscsceseseecees x 100 
remarks on infinitesimals.......0..-.e0seeee wi 135 
gravitation formula.....ccsecceeerereee WHEL 40 
adjustment of conditioned observations, 
vili 41 
GTASSMANN’S FCOMELTYsse-eeceserrereeeeee ewili 53 
density Of MerCury........cccseceseecere .Whih 45 
problem in probabilities...........s00 Saree x 89 
electric currents........ ieeras rece sas scarenaree Oe 
Hill, M., cited on visible speech.......00 vi 78, 80 
Hill, R.T., communication on the topography 
and geology of the Cross Timbers of 
Texas. Read by WJ McGee. Reference, 
x, 6 
Hillhouse, Dr. William, cited on trisection of 
AVGICS...scassesnecvstsescvhvessccccesesnsen eeerer| x 99 
Hind, cited on supposed trans-Neptunian 
planet......... Ridenesanuaend Bus Acsibsuanedsbeceeie iii 20 
Historical note on binocular microscopes, 
iv 35 
on the method of least squares.........:....4 62 
History of a geometrical problem............d44 64 
Malfatti’s problem..........-sceeees Meas rovcr ii 113 
Hitchcock, Romyn, communication on re- 
cent improvements in microscopic ob- 
jectives, with demonstration of the 
resolying power of a new 1-16th inch. 
TWGLG (OY sinunnvasconneesnene=ssarsencevesesesnuses ix 16 
Hoffman, Dr. A. W., cited on ultimate 
CAUSES. «02506 «ev 166 
se seweceseereees aeeeee Oeeereneccoes 
PHILOSOPHICAL SOCIETY OF WASHINGTON. 
Page. 
Hoffman, W. J., cited ®n the poisoning of 
BYTOWS sacapmacceebaven gapbebsaspen das saeane pvany ii 182 
communication on the use of poisoned 
arrows by North American Indians. 
TU16; ONY. n0sse osu 1 nenhl keananen i eareneaeee eee ti 183 
Holden, E.S., communication on the adopted 
value of the sun’s apparent diameter. 
Tits fal cic wsioxaseevcesceutoehe sjeapes asa easeCeeanne 195, (3) 
Sir William Herschel’s observations of 
the satellites of Uranus. Jn full... 106, (30) 
the number of words used in speaking 
and writing. In full....... soncnseees ii 28, (16) 
two drawings of nebulee, made with the 
xxvi-inch telescope of the U.S. Naval 
Observatory, by Mr. L. Trouvelot, of 
Cambridge, Mass. Abstract..........000 ii 51 
search for Vulean. Abstract... .. Sontenans ii 85 
reference catalogues of astronomical 
papers and memoirs. Abstract...... wld 695 
the shadow of the ball of Saturn pro- 
jected on the rings. Abstract....... «Ad 101 
the brightness and the stellar magni- 
tude of the third Saturnian satellite, 
Tethys. Read by A. NV. Skinner. Title 
ON nercenvaseses ee anaeene cohsupaannse Beteeeano ii 18 
B. A. Gould’s Uranometria Argentina. 
FRCference.. scassecncasasssacarssu session iii 119, 122 
Holmes, W. H., remarks on glaciers....... wii 8 
Homologies of the shoulder girdle of fishes. 64 
Homophenes... wensse seocuedsens snovessseenesepeiiin aie annem 
Hooker, Ther pmeenal phservdideas by..w 94 
Hooker, R., cited on natural law.. «Vv 173 
Hoosac tunnel, Acoustic features ahs <gaace econ 172: 
Hopkins, cited on the liquidity of the earth’s 
TNGOTION so-nseconssnngse o anpanvaceudaataentees li 76, 73 
temperature Of SPAaCe.......cessee soccssdensent@l | fee 
Hough, F. B., communication on the culti- 
vation of Eucalyptus on the Roman 
Campagna. Reference Reena Wale 
Death of........ enaeneareeenG Ssogeneetpuaispennae see Wild 25 
House of Representatives, Ventilation of, 
vi 9% 
Howland, Dr. E. P., remarks on Charleston 
earthquake....... Serer cass oaceanbsnageeeatne ix 42 
Hubbard, G. G., remarks on visible speech, 
wi 82 
Hughes’ Microphone...........csseceee covveees sued 184 
Humboldt, Baron von, cited on transmission 
Of SOUNG,.. 0.0 ccsesoceessussessesansseeeeuee wenden v 41 
Humidity observations......... Se rtece secre Wh 36 
Humphreys, A. A., Eulogy on...... ee poo: Vii 4 
DG AGW Of: i ssncncancccicevenspiudsounenas etasales ee vii 3, 4 
Humphreys and Abbot, cited on the delta 
of the Mississippi.....2......+..M (10), (12), (13) 
Huron, Altitude of Lake.......... ivabeene akseneonspthy) soo 
Huxley, T. H., cited on vital principle.....w 78 
