LA CONDAMINE, 24.

Lafond, Sigaud de, 58.
Lamé, 170, 171.
Lamotte, 190.
Lampa, 191.

Landholt, Prof., 53.

Langevin, 71, 79, 95, 247, 248,
252, 310, 321.

Laplace, 5, 58, 59, 109, 171,
204.

Larmor, Dr, 194, 302, 316.
Lausanne, 220.

Lavoisier, 51, 52, 53, 54, 58, 59,
67.

Lebedeff, 190, 193, 225.

Le Bon, Gustave, 200, 270, 287,
288, 289.

Lecher, 190, 191, 225.
Leçons élémentaires de physique
(Turpain), 180.

Leduc, Stéphane, 44, 106, 149.
Lee de Forest, Dr, 233.
Lehfeld, 114.

Lehmann, Prof., 131.
Lemme, 244.

Lenard, Prof., 178, 197, 260,
261, 263.
Lenoble, 139.

Lepinay, Macé de, 28, 33.
Le Royer, 230.

M'CLUNG, 196.
Macaluzo, 305.
Malus, 5.

Mangin, Colonel, 222.
Marchis, 139.

Marconi, Guglielmo, 218, 224,
226, 227, 228, 230, 231,
232, 233, 234.

Marx, Prof. E., 196.
Mascart, 201.
Massieu, 88.

Matériaux pour la dynamique
du ciel (Mayer), 60.
Mathias, 106, 112, 116, 117.
Matteucci, Prof., 251.

Maxwell, Clerk, 86, 100, 129,

169, 185, 186, 187, 188,
189, 193, 194, 205, 221,
293, 308.

Mayer, Jules Robert, 57, 60, 61.
Mazotto, Dominico, 211.
Mécanique céleste (Laplace), 5.
Melhuish, W. F., 216.

Mémoire sur le chaleur (Laplace),
58, 59.

Mémoire sur le mouvement

organique et la nutrition
(Mayer), 60.

Atoms, ejection of electron by,
287, 307; atomism, 92-104;
essay of Hannequin, 93;
atomic theory and optics,
heat, chemistry, 93; pre-
ponderating part of, in
physics, 95; to be promoted
from rank of hypothesis to
that of principles (Langevin),
95; atomism not to be con-
fused with molecular physics,
95; evolution of ideas con-
cerning, 96; properties of a
body modified in small mass,
97; atomistic synthesis now
accepted, 103; complex edi.
fices formed of elements, 104;
electric, suggestion of, 168,
246; not the smallest fractions
of matter, 249; metallic,
dissociation of, 254; of hy-
drogen, 257, 315; dissociation
of material, yields electrons,
268; atomic energy and disso-
ciation of matter, 282; atoms
of radio-active bodies easily
detached, 282; and radium,
284; complete dislocation of,
288; supposition concerning
dynamical system, 305; com-
position of neutral, 306; posi-
tively charged centre of, 318;
of the stars, 321.
Auer-Welsbach gas mantles,

295.

Aurora borealis, spectrum of,
125.