INDEX, 
1 EAS Be eee Ae eee ae 119° 
1. TD eo ee eee 106, 108 
4s hydration of.... ... PSA rr ie 127 
- ROMMIEON: Of e504 s tcae se eee 127 
“ec 
variable composition of. ...110 
Moisture, effect of, on temperature 
SOT Ne ts Aawrmrcteds aatenee 195 
PNM te coors nit Su cree Aaton Salomly gee the 156 
MoOorDed Pane ws. 242 foes ats s Sx s bs 157 
WER Serre VEC ROU ae sie, shes See 155 
Nitrate of ammonia........... 71, 73 
** - oa in atmosphere. 89 
PRN GEAR es oo hss Nero sere sinda se 252 
ef as food for plants.......... 271 
“S formed in soil.... ..... 171, 179 
sf PAI WREGES: -. Soe tae a Tes 270 
bd ROIS OR) SS econ Sess a eee 270 
$¢ reduction: of... 2... .- 13, 82, 85 
s se SOU BOT hee Ss 268 
= (ESSLIS Ty (0) pan ge eae SS Ee fel (3, 
PILPG RE ss eee A baie bee ens. he 7 
Se ‘** as plant-food. .. ... .90, 98 
es ** deportment towards the 
ROU eoe sss. Sade ae soot 
oe “in atmosphere. . 4.55... 86 
= roe TAME WALeT eo fo 5 86 
BP eu EE ROM N= 2b) oo fact otsts 251, 254 
sae SS te't oe? BONECES (Olas rea. > 256 
CURE SIG 5 128 geile dhs wees oS: 72 
BNPLIEIG *PCrORIGG. Mosc etc cea fons eed 42 
IN MEMCAEON «28 eds wae Te 252, 286 
s conditions of...... 265, 292 
Nitrogen, atmospheric supply to 
PIAS be ce te Mya es 2s 95 
ne combined, in decay.291, 292 
as * of the soil.. .2%5 
: combined, of the soil, 
available pies Fs she 283 
= combined, of the soil, 
TCTEAS b> oy ese Hee Ste 278 
st combined, of the soil, 
quantity needed for crops.288 
c free, absorbed by soil. . .167 
ye ** assimilated by the 
ROU e ee al R. 259 
¢ SS MVSOU lec Ste 218 
« * not absorbed by 
vegetation..... 26,99 
es ** not emitted by liv- 
mg plantse.cd ss 23 
Nitrogen-compounds, formation of, 
in atmosphere.75, 77, 
1 
| 
| 
————— 
XIII 
Nitrogenous fertilizers, effect on 
cereals... 83 
Nitrogenous organic matters of soil.274 
UNTEEOUS |ACLOIS a0 os a ca wea cae "2 
INGTPOUSYORIGE: = nes 13:55. 71, 93 
Oohens ties em fence. Seine sacle 156 
Oxidation, aided by porous bodies. 
169, 170 
Oxide of iron, a carrier of oxygen. .257 
=e oe hydrated, in the soil.350 
Oxygen, absorbed by plants........ 98 
ie essential to growth. ..... 23 
*t exhaled by foliage...... 25, 99 
ee function of, in growth..... 24 
a TBO! se-A eas enenere sees 218 
cM SUPP] y: .cePese eit Sisal ae 94 
ae weathering action of..... 131 
ne seh e e Ota, oes oe 63 
** concerned in oxidation of ni- 
EEO DEN Le SS vee tee a= 82 
‘** formed by chemical action.66, 67 
‘* produced by vegetation.67, 84, 99 
‘** relations of, to vegetable nu- 
tHONs 4. sdais oc Sees ees 70 
Pan: composition Of:..-...4-a5 se eooe 
Parasitic plants, nourishment of. . .235 
REAL Soe ens ane at eee ie es 155, 224 
PS CULPOCEN Ole acces eee 27 
Phosphate of Jimes.y.i.8 dss Seen es 116 
Phosphoric acid fixed by the soil... .357 
os ** presence in soil 
water_ P82. 315 
IPHOEPNOTIFE.. 5 bd, 1. Seb dan agi 2 116 
Plant-food, concentration of... .....320 
se maintenance of supply.371 
Platinized: charcoal.\sens2-k Jeaeee 2 70 
Platinnm sponge, condenses oxygen170 
POR PDY RY. oa inoed DAE FI oho wanes oe 120 
Potash, quantity in barley crop.....363 
Provence drouths: of-2 wees. ee 198 
WYTULESS Saks si Saw es 6 case es 115 
Py TORENG SS atacicD ors Soa Se ees 112 
UU CE? oe. coats Spree eee ae 120 
Potrerachion ©: sje pes Meee eer 290 
Ouarias 262 ae aero cot ee ee 108, 122 
Rain-water, ammonia in......... 60, 88 
ck nitric acid jn........: 86 
ee phosphoric acid in.... 94 
Ree Ree bottom, soil of...... arr ATS, 
Respiration of the plant............ 43 
ROCKS 2 ork 50 yt eae es aes 106, 117 
‘* attacked by plants. ..........140 
