остова 18, м ЕДК 
KALMIA LATIFOLIA. 
— Waen I visited the Arnol 
ton, re in June, hrs 10, 
play t here "was ma y Kalmia latitolia 
eve I was fortunate in seemg it more than 
d Шу fine ш, Pro е Буца nt, oo og d 
t the photog raph ах is p ; g. 93, 
tes that ihe Kalmias this year e im even 
ld Arb 
um, 
ong 
d of the Tsuga, к greatly ту бена 
ће effect. The Kalm о е Еаз{егп 
United States, and T made an ion into 
ipshire ы + sit growing w wild. It was 
hae rth 
ve to six feet hi 
of Kalmia latifolia has nev 
reci ngland, g 
ne plants to be found in the 
of the kingdom, few tter, 
ne in Bagshot Park, figured in 
"^ Chronicle for Septemb er 13, 
The Royal Horticultural pod has it 
lso very fine at Wisley. W. J. 
BOTANY AND THE EMPIRE.* 
nti ae from page Lg 8) 
[е most remarkable ance on re 
ssfal combination М science апа 
куы ae ment ot 
of the 
f PROBABLY 
; ted all way among the negro 
E with ihe. val кыйы Ps results. 
Ete selectin g the ocal 
ES ind plan 
t 
,090. y fics time both the pode 
to 
had begun realise „the 
organis under ecientific control a 
travelling agricultnral actors to 
ist th ators in а with 
insect pests and improve the quality 
produce. е exports had in- 
с Е" Su fourfold, and reached a total value 
5,000, while in 1916, what ed Ву 
regarded as is maximum exports of 
the value of £3,847,720. 
It should be borne in mind that this Gold Coast 
q British Association for the Advancement of Science. 
E to ng oe ен by Sir ран Morris, 
j OMG., M D.Sc. , LL.D., F.L.S., President 
TE Section.” 
ew Bull.. 1891, 169; 1895, 11. 
THE GARDENERS’ 
the ен мр 
I 
CHRONICLE. 
205 
cacao industry, now 
on argest i in the 
world, has Pag hom ed i 
yb 
in extent. The controlling factors w 
pe pce of suitable lar г ca 
se 
"d аба es gm pud io gate с : and, 
Bn the advi ice and күш тайнен, of trained 
Euro the resources of science. 
Hay, well bee aie from 
Elwes in the produ 
historical research and Р dime has established 
the fact t tha at many fast-g fi in cultiva 
tion Oak, me, Cricket- 
Bat Wi es. Black Italian oed an 
don re are hybrids. It was of high sc 
ce to discover the origin of these valu 
m sale er, by artifici Р EE on 
ceeded raising 1 hybr vni 
extraordinary lou 
e by first genera үт сгозв. the 
most ble, so far, i new hybrid pos 
pedum с didi: makes the strongest 
shoots of all Popl 
hio d s 
istic he 
d trees is well 
of the Cricket-Bat Jom 
ix d a 
5 
ragilis 
n fourteen or 
t is further claimed that by hybridising it may 
ible to produce disease-resisting varieties 
and varieties carrying with them cther desirable 
char: азаа Ука сє. 
епгу ecently made an elaborate investi- 
gation er the history of the London Plane- 
Platanus acerifolia).f Не has established the 
үү this t 
all the аы о a oss. AS 
eee in hybrids gt the first generation, E seeds 
ui d. a mixed and oii crop of 
ich hal уа пошу о ombined the 
e is growing in the 
at Ely. see vid — by Bishop G 
tween 1674 and 1 
p 
ee and 
Д bee 
also i 
s been found tos se a о 
3 
2. 
Ф 
2 
B 
Р. 
S] 
_mmisyoursble а of soil апа 
ospher 
n the “Tropic breeding experiments in the 
acest aped are likely to prove 
eantime, Lap on of 
reasing the general yi eld 
zhi be тады f th 
mes seed for’ planting should be taken only 
selected for their high-yielding capacity 
Where good is not readily ио “Lock 
has suggested that the best trees might be 
from cutt: 
Plan t-breeding experiments with india-rubber 
trees have already been attempted, ‘but emer m 
* Science and the Nation. 138 i 
+ Proc. Roy. Irish Acady. XXXV. 
B.2.10.. 
5 and 
possibilities, 
not likely 
fined 
to be of much value if they are con- 
d be carri 
equipped stations devoted to 
in ndred problems. Such sta 
ould pa established i 
mai to 
the Middle East of s Be Ке — petens 
'The Agricultural Department of rd which is 
fully aliv the А 
selection : 
already take 
some actio 
нн s edle dd 
fifty ea Bis te whose gp ear Калы wield 
has biu rec " ever June 
es 
the Exper: ng eue 
When the trees are “fit for арр E the Ee 
уйн аге determined the n l be cut 
s purposes 
mec er investigation in pendens rmine 
whether the latex. ү pK qualáy t ee trees 
ted with any definite ‘botanical 
ees of ‘sam 
К 
ble. es of the 
have bee 
a four-acre block 
for differences in leaf and bark c 
all tapped on the same system 
о! ОКЕ from each tree is recorded 
separately for each tappin, 
| aracters 
are transmita 
"o 
experi 
(rts ago expressed the opinion 
that RS is i} gore) for wide views of our 
problems more ev vident than in the study 
pe nt та 
gricultur 
и роса creel 
experiments ^ carried continuously Љу 
Nr nri for "on. d. years. 
"the professional mycolo- 
gist is accustomed to c anfine his attention too 
exclusively to the acti ent of the disease," 
while, on the ot бала, “the professional culti- 
ator gives itually eight to the 
possibility of preserving plants f lisease by 
in.proving his me of cultivation, Both are 
right, yet Пу wise, and there is 
uch room for a race of mycolog who not 
only discover how to cure plants but know how 
et ae them.”§ As we have already seen, 
1 
s 
ns oe a 
valu: 
(Ha mileia 
ing эл immune à 
ures, whi а are known in some cases to іп- 
а the attacks of fungous pests апа 
substituting the use of phosphates. 
(T'o be concluded. )- 
* Kew Bull, 1917, 118. 
t Jour. d' Agric. Tropicale. 1907. 
1 Address, Section M., 1911. 
$ Seience and the Nation, 118. 
