« PreviousContinue »
269, 270; force developing, 277. sun observed from, 374.
annual number of eruptions, 233 ;
quakes caused by, 234 ; supposed
causes of action, 235; Sir John
perature, 243; the two requisites Volta, Professor, electricity rendered
duction, 300; characteristic pro-
rings discovered by, 374, 375. rating heat and light, 301-303 ;
the sun and, 21; perturbation in discharge oxidizing silver, 305,
309; conductors of, ib.; relations
effects of, 310, 311; science sug-
netized needle, 312; rotation ef-
magnetism, 314, 315; distinction
unvarying dual force of, 334.
129; in music, 131; number made by perfected, 298-300.
of the ether in natural and po- Vosges mountains, temperature of
by the laws of unequal expansion,
Water, constituent parts of, 111;
mountain heights, 120; as a me-
Libra and, 42; variable star in, ized circularly by, 194; experiment
of the ethereal medium maintained mean temperature of, varying in
the same latitude, 246, 247.
-, atmospheric, over local districts, in solar heat computed by, 225.
of sound, 131 ; furnishing an sensitiveness to sound, quotation
fraction, 156 ; discovery of rayless
objects by means of light, 203, 204. observations of, on the chemical
ancient and universal division of 203, 209; magnetic rotation sug-
gested by, 313; light emitted by
X1 Ursæ Majoris, periodic time of,
398 ; velocity of the revolving star,
YEAR, a, in Jupiter and Saturn, 66 ;
length of the sidereal, ib.; period
Egyptian, 85; first of our era, 86;
length of the, affected by a comet's
latory theory established by, 169;
light, 175 ; illustration of, proving
sound and heat kindred forces, 280,
124; extra-tropical, in the North ZETA Cancri, a triple star, 395 ;
228 ; comparative unequal distri-
ture on its crystals, 107; sulphate torrid, 244 ; of fixed stars, 385 ;
bulous, 416; of nebulous patches,
Zones of instability of planetary orbits,
of temperature in the ocean,
atmosphere, 119; laws of storms of vegetation on the Peak of
LONDON: PRINTED BY W. CLOWES AND SONS, STAMFORD STREET,
AXD CHARIXG CROSS.