134 
PHILOSOPHICAL SOCIETY OF WASHINGTON. 
Page. 
Eastman, J. R,, communication on—Cont’d. 
the frequency of the occurrence of the 
zero and the nine digits in the tenths 
of seconds as obtained from the chro- 
nographic record of transit observa¬ 
tions. Abstract .i 85 
the comparison of rain-gauges at differ¬ 
ent elevations. Abstract .ii 49 
a personal equation instrument. Ab¬ 
stract ...iii 33, 37 
some results from the discussion of the 
observations of the transit of Mercury 
of May 6,1878. A bstract .iii 43 
the Florida expedition for observation 
of the transit of Venus [1882]. Ab¬ 
stract .vi 21 
the Rochester (Minnesota) tornado. Ab¬ 
stract .vii 3 
a new meteorite. Abstract .vii 32 
remarks on vocabularies. ii 28 
Eaton, A. B., communication on the preser¬ 
vation of foods. Title only .i 22 
Death of. ii 111 
Eaton, Prof., cited on classification of ferns. 
iv 110 
Earth, Interior of.. ii 76 
tremors as shown by astronomical obser¬ 
vations...... iii 120 
at Niagara Falls. iv 186 
Velocity of. viii 28 
Earthquake. See Seismology. 
Earth’s crust. Crumpling of. viii 18 
interior, Condition of. viii 7 
Easter, Computation of. vi 15 
Echo from surface of ocean.. ii 171 
Echoes, Tyndall on. v 41 
Eclipse of the moon, June 11, 1881. v 90 
sun, January 11, 1880. iii 121 
sun, July 29,1878..... ii 202, iii 116 
Economic phase of the English sparrow 
question. x 16 
Economics. See Political Economy. 
Education in Japan. ii 69 
Edwards, W. H., cited on the pupation of the 
Nymphalidee. iii 42 
Eidocenter... viii 47 
Eimbeck, Wm., cited on the diorthode. vi 132 
Elasticity.... v 130 
Election of officers. i 20. 32, 64, 91, ii 16, 59, 
86, 161, iii 17, 51, iv 29, v 84, 174, vi 111 
vii 81, viii 80, ix 47, x 39. 
officers of the Mathematical Section. ..vi 122, 
vii 87, viii 37, ix 53, x 83 
Electric receivers.. iv 153 
researches by Joseph Henry. ii 236 
Electricity as a primitive force.v 168 
Page. 
Electricity, List of papers on (See also 
Acoustics ): 
on the recording systems of the trans¬ 
atlantic cables. J. E. Hilgard. Title 
only .i 53 
[a method of lighting gas jets by electric¬ 
ity.] Dr. Van Sant. No abstract ...i 56 
on electricity engendered by the driving 
belt of the machinery for ventilating 
the Capitol at Washington. J. Henry. 
Abstract .ii 40 
Jablokoff’s electric candle. J. E. Hilgard. 
Title only .iii 19 
large area illumination by electricity. E. 
B. Elliott. Title only ....iii 45 
the storage of electric energy. C. H. Koyl. 
Abstract ..v 46 
units offeree and energy, including elec¬ 
tric units. E. B. Elliott. Title only, 
vi 137 
electric lighting. E. B. Elliott. Title only, 
vii 80 
[exhibition of a volt-meter.] T. C. Men¬ 
denhall. Abstract .viii 26 
the electrometer as used in observations 
of atmospheric electricity. C. F. Mar¬ 
vin. Title only .x 9 
the mutual action of elements of electric 
currents. E. B. Elliott. Abstract and 
reference .x 92 
the quotients of space-directed lines. . E. 
B. Elliott. Abstract .x 105,106 
Elements, Periodic law of.. vii 15 
Elevation. See Altitude. 
Eliot and Storer, cited on atoms.v 128 
Elliott, E. B., calendar of the Society. ..vii xxii, 
viii XXX, ix xxvii, x xxxi! 
communication on the statistics of the 
borrowing power of the United States. 
Title only .i 29 
the new coinage of Japan. Title only...i. 31 
the locus of the point of equal illumi¬ 
nation by two unequal lights treated 
by the quaternion analysis. Title only, 
i 35 
the adjustment of census returns. Title 
only .i 63 
life and annuity tables, based on the 
census of 1870. Title only .i 74 
international coinage. Title only .i 75 
change in value of dollar. No abstract, 
i 91 
the credit of the United States, as shown 
by the value of its securities. Title 
only .i 109 
