Arsinoe, lodestone roof in temple
of, 44.

Arundel, Lord, his magnet, 333.
Aryans, the, 61.

Ascham, on Italian learning, 334.
Asclepiades on use of amber, 52.
Astrolabe, 179, 215.

Astronomy of Chinese, 79.
Attraction, theories of, prevalent in
17th century, 433.

Attractive point, Norman's, 214.
Aurora, Bose suggests elec. origin
of, 499.

Averrhoes, on amber attraction, 156.
Azieros, 22.

Aztec ignorance of iron, 21.
Azimuth compass, 181.

B.

Babylonia, comection of Chinese
with, 63.

Bacon, Francis and Descartes, 356;
and Gilbert, 317; criticisms on
Gilbert, 321-322; definition of
heat, 417; indebtedness to Gilbert,
319, 329; inductive method of, 330;
invective against Gilbert, 327; ob-
serves shock of torpedo, 401; on
learning of his time, 334; on med-
icine, 253; on truth, 311; physi-
ological remains, 324; reference to
Aristotle, 279; reference to elec-
trics, 325: relation to old and new
phil'y, 331; treatise on magnet,
326.

Bacon, Roger, 160; on Peregrinus,
165.

Bailak Kibdjaki, 110; on mag.
rocks, 100.

Bak tribes in China, 63.

Bandi, Countess, spont. combustion
of, 503.

Barlowe, Dr. W., 316, 336, 337; con-
troversy with Ridley, 338; mag.
discoveries and relations to Gil-
bert, 340.
Barometer, Picard's luminous, 453.
Battery, Franklin invents series,
556, 559; first electrical, 523.
Beal, telegraphic predictions, 387.
Beauvais, Vincent de, on magnet,
158.

Bede, on magnet, 115.

Bellerophon, suspended horse of, 46.
Bell, Gordon invents elec., 507;
Schwenter's mag., 383.
Bells, alleged lightning protection
by, 592.

Belus, magnets in temple of, 29.
Bercy, Hugo de, 157.
Bernouilli, John, 455, 469.
Betham, Sir W., 56.
Betulae, 56.

Bevis, Dr., imp'ts on Leyden jar,

534, 555.

Bible of Guyot de Provins, 152.
Birds as guides at sea, 106, 113.
Blanco, Andrea, map of, 197.
Bleaching, elec. discovered by

Krüger, 508.
Bologna stone, 454.
Bond on compass variation, 446.
Bononian stone, 454.

Boodt, De, disputes mag. teleg'h,
383; on lychnites, 43.

Bose, George Matthias, 493; "beati-
fication," 498; electrical poem,
498; electrifies water jets, 499;
experiments, 495; ignites gun-
powder by elec'y, 497; invents
prime conductor and obtains
powerful discharges, 496; suggests
elec. origin of Aurora, 499.
Bowdoin, correspondence
Franklin, 585.

with

Boy, Gray's exp'ts with suspended,
476.

Boyle, Robert, 404; additions to
electrics, 419; compared with
Hooke, 427; correspondence with
American scientists, 425; corpus-
cular theory, 416; disputes Gil-
bert, 417; elec. and mag. theories,
415; electrical doubts, 421; Eve-
lyn's estimate of his character,
424; experiments, 420; first sci-
entific chemist, 414; not original
discoverer of elec. repulsion, 420;
observes mutual att'n of electrics
and rubber, 418; observes odor of
rubbed electric, 415; on mech'l
production of elec'y, 418; on Van
Helmont, 375; primary concepts,
415; sermonizing, 424; theory of
elec. repulsion, 419.

Brand, discovers phosphorus, 454.
Bremond on Mahomet's coffin, 47.
Britain, magnet known in ancient,

114.

Browne, Sir Thomas, 380; exp'ts on
mag. telegraph, 386; on garlic
myth, 143.

Bruno, Giordano, 267, 333.
Buffon, De, declares elec'y unripe
for fixed laws, 548; on Franklin's
exp'ts, 587.

C.

Cabæus, Nicolaus, 349; criticises
Gilbert, 350; discovers elec. re-
pulsion, 351; elec. theory, 351;
on Garzoni's discoveries, 229; on
mag. spectrum, 352; on mag. tele-
graph, 385; theory compared with
that of Boyle, 419.
Cabiri, 23, 25.
Calamitico, el, 204.
Cambridge Univ'y in time of Gil-
bert, 261.

Canal, Necho's failure to build, 58.
Cardan, Jerome, 243; differentiation

of amber and magnet, 249; Gil-
bert's attitude toward, 280; on
lightning, 568.

Cardinal points, Chinese and Chal-

dean names similar, 63; Etruscan
inv'n of, 59; named by Charle-
magne, 133; named by Flemish
sailors, 133.

Cart, Chinese south-pointing, 67, 69,
71, 72, 73, 81.

Casciorolus discovers Bologna stone,

599

Chaucer on compass points, 191.
China, amber in ancient, 74; burn-
ing of books in, 66; first ships
built in, 78; first south-pointing
chariots in, 67; iron in ancient,
73; magnetic rocks on coasts of,
98; nucleus of, 64; original set-
tlers of, 63; pagodas in, 564;
Phoenician voyages to, 77; south-
pointing carts, lost art in, 71;
Tchou dynasty in, 68; voyages to,
in 675 B. C., 56.

Chinese, ancient navigation of, 77;
astronomy, 79; characteristics, 77,
81, 82; chronology, 65; connec-
tion with Akkadians and Baby-
lonians, 63; discover compass
variation, 76; first knowledge of
amber, 74; same of lodestone, 72;
geomancers, 76; junks, 77, 78;
inventions, 80; legend of ambas-
sadors, 67; mariner's compass, 75,
76, 85, 189; south-pointing char-
iots, 67, 69, 71; superstitions about
compass, 105; voyages to Japan,
etc., 78; worship of magnet, 80.
Cherif-Edrisi, 100.
Chow, King of, 70.

Chronology, Chinese, 65–67.
Circuit, first elec., 525; Lemonnier's
water and metal, 532; Watson's,
across the Thames, 549.
Claudian, poem on magnet, 93; par-
odied by Strada, 383.
Clayton, letter to Boyle, 425.
Clement of Alexandria, 45.
Clutcher, name for amber, 17.
Clycas, 45.

Coition, magnetic, 276.
Colchester, 260.

Colden, Cadwallader, 585.
College, The Invisible, 379.
Collegium Naturale Curiosorum,
490.
Collinson, Peter, 538, 583.
Colonne, poem of Guido, 156.
Columbus, Christopher, 195; mag-
netic discoveries of, 200, 202; the-
ory of compass, 199.
Combustion, cases of spontaneous,
503.

Compass, Mariner's, alleged use in
building Great Pyramid, 57; An-
cient Finn, 141; Appulus on, 117;
Arab, 110; attributed to Egyptians,
57; to ancient Greeks, 54; to King
Solomon, 55; to Phoenicians, 54;

Dioscorides on magnet, 92;
ligurius, 42.
Dioscuri, the, 23.

on

Dip of magnetic needle, 209, 210;
Affaitatus' supposed disc'y of,
211; Gilbert on, 213; Hartmann's
disc'y of, 209; Norman's disc'y
of, 215, 217.
Drebbel, Cornelius Van, 44, 192.
Dufay, Charles François. 478; broad
view of elec'y, 487; discovers vit-
reous and resinous elec'y, 484;
electrifies himself, 483; electrifies
metals, 479; exp'ts on colored
objects, 481; on distribution of
charge, 483; no distinction be-
tween electrics and non-electrics,
479; sends letter to R. Society,
485; recognition of Gray's work,
485; tribute to Gray, 487; uses
solid insulators, 482; verifies
Gray's exp'ts on conduction, 479.
Du Tour on Nollet's theory, 554.

E.

Earth, field of force of, Gilbert on,

292; magnetism induced by, 227;
return circuit disc'd by Watson,
550.

Eclipse at time of Thales, 34.
Effluvium, electric, Cabæus on, 351;
Gilbert on, 308; magnetic, 292.
Egypt, absence of Science in an-
cient, 31; iron in, 28, 58; lack of
amber in ancient, 52; mag. sus.
pension in, 45; opening of, to
commerce, 30; religion of ancient,
31; vending machines in ancient,
87.

Egyptians, ancient, ignorance of
magnet of, 27; alleged knowledge
of compass by, 57; voyages of, 58.
Electorius, 42.

Electrical, first use of word, 339.
Electric and magnetic motion com-
pared, 311; attraction, theories of,
307; attraction, Gilbert on, 308;
bell, inv'd by Gordon, 506; light,
see Light, electric; Machine, Gor-
don's, 506; Hauksbee's, 461;
Guericke's, 395; Winkler's, 506;
Motor, Gordon's, 507.
Electricity and lightning, Frank-
lin's exp'ts on identity of, 580, et
seq.; Freke on identity of, 571;
Nollet on identity of, 573; Wink-
ler on identity of, 572; and mag-
netism linked by Newton with

бог

gravity, 439; atmospheric, De-
saguiliers theory of, 489; Frank-
lin's theory of, 576; beginning of
modern, 299; Boyle on mech'l
production of, 418; Digby on,
378; dual nature of, found by
Dufay, 484; and by Kinnersley,
586.

First application to medicine,
501-2; first attempt to measure,
523; first book on, in English,
420; first distinguished from mag-
netism by St. Augustine, 89; first
notice of, by R. Society, 402; first
use of word, 373.

Gordon kills animals by, 507;
Franklin's theory of, 643; Ger-
mans regard as fire, 492; Greene's
poetical references to, 369; Hau-
sen's theory of, 494; Jonson's ref-
erence to, 368; new theories of, in
1747, 553; Quelmalz, theory of,
503; resinous and vitreous, dis-
covered by Dufay, 484; s'Grave-
sande's definition of, 488; speed
of, Lemonnier's attempt to meas-
ure, 532; Watson's attempt, 551;
Winkler's attempt, 506; Watson's
theories of, 507, 534.

Electrics, and non-electrics, Dufay
on, 479; Bacon on, 325; become
non-conductors, 482; Boyle's ad-
ditions to, list of, 419; Boyle ob-
serves mutual attraction of elec-
tric and rubber, 418; Browne's
exp'ts on, 381; Cabaeus' additions
to list of, 350; Descartes on, 364;
Gassendi on attraction of, 418; Gil-
bert's list of, 299; Gilbert on
nature of, 307; mutual attraction
of, obs'd by Acad. del Cimento,
433; naming of, 302; per se, 488.
Electrida, 17.

Electrides, 16, 17.
Electro-magnetism, word coined
by Kircher, 365.
Electrometer, first use of word, 524.
Electron, 16.

Electrum, in Egypt, 52; lake, 17.
Elicott, John, elec. theory of, 554.
Elizabeth, Queen, learning in time
of, 332-334; legacy to Gilbert 265.
Emerson, R. W., on genius, 426.
Emperor First, Chinese, 66.
England in time of Elizabeth, 334;
in time of Hauksbee, 463.
Ephesus, mag. suspension in temple
of, 46.

Fathers of Church, on magnet, 90.
Ferabosco, the, visits R. Society,
407.

Ficino, Marsilio, mag. theory of,

240.
Field of force, Descartes on, 359;
development of, 218; Dufay on,
483; Gilbert on, 272, 291; iron fil-
ings in, 50; Lucretius on, 48;
magnetic and electric, 434; Max-
well on, 440; Newton on, 440;
Peregrinus on, 172, 207; Porta on,
235; Sarpi on, 227.
Figure-head, inv'n of the, 59.
Finland, conquest of, 137.
Finns, the, 59, 83; and Lapps, 139;
magic of, 138; superstitions con-
cerning, 139; use of compass by,
139.

Finno-Ugric family, 59.

Fire, ancient records of atmos-
pheric, 568; electrical, 509; Ger-
mans regard elec'y as, 492.
Flesh magnet, the, 159.
Fludd, Dr. Robert, 375.
Fluid theory of elec'y, Franklin's,
544.

Form, Aristotelian, 276, 282, 419.
Fountain, Desaguiliers' electrified,
489.
Fracastorio, Jerome, amber theory
of, 241; Gilbert's attitude toward,
280; on mag. rocks, 204.

France, condition of phys. science
in, in 17th cent'y, 452; Franklin's
exp'ts repeated in, 587; learned
societies in, 378.

Franklin, Benjamin, 537; advises
Collinson of discharging effect
of points, 541; correspondence
with Colden, Bowdoin and Belch-
er, 585; electrical exp'ts on Ley-
den jar, etc., 543, 544, 545, 556,
558; on identity of lightning and
elec'y, 580; on points, 541; on
suspended scale pan, 582; experi-
ments repeated in France, 587;
invents plate condenser and series
battery, 556; kite experiment, 590;
lightning rod, 582; papers rejected
by R. Society and published by
Cave, 583; regards lightning as
fired sulphur, 575; retires to de-
vote himself to elec'y, 547; the-
ories of elec'y, 543, 576; theory
claimed by Watson, 552;

uses

battery for curative purposes, 585.
Fra Paolo, 224.

Frederick I. of Prussia founds Ber-
lin Society, 490.

Freke on identity of lightning and
elec'y, 571.

Froude, on genius, 426.

G.

Gagates, the, 43, 126.
Galen on amber, 52; on lodestone,

92.

Galileo, abjuration of, 355; con-
demnation of, 356; correspond-
ence with Duke of Tuscany, 345;
experiments on magnet, 345: on
Gilbert's discoveries, 344-345; on
magnetic teleg'h, 385.

Garlic, alleged effect on compass,
143; Matthiolus on, 281.
Garzoni, alleged mag. discoveries
of, 229.

Gassendi, elec. theory of, 418.
Geomancers, Chinese, 75.
Germany, physical science in, 490,

492.

Gibbon on Mahomet's coffin, 46.
Gilbert, William, 258; amber at-
traction of water, 310; amber
questions, 295; and Aristotle, 270,
275; and Barlowe, 340; and Guer-
icke, their mag. theories com-
pared, 393; and Kouopho, 311;
attitude to predecessors, 279; au-
thorities quoted by, 280.