INDEX.

The Figures refer to the Paragraphs.

Abortion, habitual, climate useful in, 1329

Actinism, 284

necessary to germination and vegetation, 284

Æther, inhalation of, effect of on blood, 820

Age affects "vital capacity," 731

Air, amount of, vitiated by fires, lamps, and candles, 1121

pulmonary and cutaneous transpiration, 1121
respiration, 1121

which enters between window-frames and sashes, 1148

change produced in, by respiration, 848

dry, weight of, how ascertained, 32

dryness of, how indicated, 149

increases with temperature, 147

expansion of, 165

maximum humidity of, 13

Aqueous vapour, component part of atmosphere, 12, 15

161

quantity of in air, 13, 14
of atmosphere, 143 to 238

supports a portion of barometric column, 51,

Arachnida, respiratory organs of, 674

Army, health of, may be made to compare with that of the civil population, 1141
Arterial blood, iron of, a peroxide, 883

T

Aspect, 1173 to 1177

and situation, importance of, 1171, 1172

Assemblies, public, what most to fear in, 1153.

Asterias, respiratory organs of, 674

Asthma, peculiarity of, 1319, 1320

induced by highest elevations, 1218

Astronomical divisions of year not in accordance with nature, 369 to 371
Atmosphere, accidental ingredients of, 16

adventitious ingredients of, 12

amount of pressure of on human body, 56

aqueous vapour of, 143 to 238

capacity of for heat, affected by temperature, 65

centrifugal force of, 70, 103

chemical constituents of, 9, 10

modifications in, occasioned by lightning, 272

composition of, preserved unchanged, 661
contains organic living bodies, 1144

contaminations of, 20

of crowded rooms, animalcules produced by, 1143
decreases with distance from earth's surface, 61, 62
density of, 58 to 62

and temperature of, relation between, 630 to 632
dry, weight of, 28, 29

dryness of, associated with health and disease, 1261, 1265 to 1279
elasticity of, 64

electricity of, greatest intensity of, 390

derived from thermo-electricity of earth, 241
electrical condition of, indicated by clouds, 191

and chemical condition of, in relation to snow, 210
state of, varies with winds and seasons, 250, 251

entire weight of, 53

expansion and contraction of, 93, 94

extent of impairment of, by congregations of persons, 1122
finite, arguments in proof of, 103, 104

Poisson's opinion of, 105

Wollaston's arguments in favour of, 102

foreign bodies in, 21, 23

gases of, consist of molecules, 11

obey laws of diffusion, 57

heavier than hydrogen, 28

height of, 38, 99 to 107

humid, induces hoarse voices, 1275, 1276

humidity of, associated with health and disease, 1261, 1266 to 1279

increased weight of, associated with epidemic disease, 637

lighter than water and mercury, 28

limit of, 99 to 107

to animal life, 108, 109

of London, carbonic acid gas in, 1127

mean equatorial temperature of, 71, 72

moisture of, dissolves noxious gases, 1167

ordinary pressure of, great importance of, 55

permanent, not dependent on temperature, 198
phosphorescence of, 23

pressure of, sudden diminution of, effect of, 640
properties of, 7

purity of, how deteriorated, 1105

rarefaction and condensation of, 63 to 66

their influences on temperature,

65, 66, 92

relation of, to combustion, 67

Atmosphere revolves with earth, 5

153

of rooms contaminated by artificial illumination of, 1105 to 1108
source of nourishment of vegetable kingdom, 666

specific gravity of, 27, 28

influenced by temperature and humidity, 30

temperature of, 68 to 73, 75, 76, 78

associated with health and disease, 1261 to 1279
in clear and calm nights increases with height, 91,

Barometer, the, as affording indications of the weather, 641

aneroid, 51

average annual range of, 619

corrections of, for capillarity of tubes, how made, 46

expansion of mercury, how made, 45
index error, how made, 47

effect of fall of one inch on boiling point of water, 633
employed to measure heights of mountains, 37
fall and rise of, on what dependent, 622 to 624
falls at new and full moon, 628

greatest monthly pressure of, 627
maximum height of, 620, 626

mean annual height of, 618, 621
mercurial, 37

minimum height of, 620, 626
range of, within tropics, 625

- water, 34

Barometric column, amount of fall of, at various heights, 48

fall of, followed by diminution of epidemic disease, 638
high, associated with epidemic disease, 634 to 636

Bazalgette, Mr., his plan of sewerage for London, 1045

Blood, changes in, during respiration, 870 to 890

· coagulation of, 816

on what dependent, 823, 824

prevented, retarded, and accelerated, 819

coagulum of, 817

- colouring matter of, Scherer on, 900

- composition of, 791

effect on, of inhalation of æther, 820
malarious agents, 825

- granules of, 815

of invertebrata, colour of, 790
lymph corpuscles of, 807
molecules of, 815

properties of, 826

quantity of in human body, 829, 830

red corpuscles of, 793, 795, 798

composition of, 806

Della Torre's opinion of, 800

during life, attract each other, 816

have no affinity for the white globules, 816

of embryo, peculiarity of, 797

existence or non-existence of nucleus of, 793, 794
form of, 795

globuline of, 795

Brick sewers objectionable, 1051

Brighton, 1358 to 1361, 1376 and note

British Army, sanitary condition of, report on, 1130, 1135

Bronchia and air-cells give out volatile matters, 907

Bronchitis, climate serviceable in, 1349