New Orleans Republican. [volume] (New Orleans, La) 1867-1878, 1874-01-04

the eucalyptus in abating malar;o,,
ences are entirely credible, but II = W
cessary to account for this effect h 10 uus
ence to an emission of antisent;c ~ Nh
GUS efHuvia." The influence Of al, Osmph
climate and health through their a 1rees
of the soil simply ia much greatar slaa
popularity recognized. Careful erna! .aau
of Pettenkofer with an old snresSl 'uelt
in the park at Munich led to the s"n.sA
that the discharge of water thrn"vaqaa
leaves during the summer was e;ah.sl
half times greater than the anu aada
water falling in rain during the sa,n uuas
upon the ground covered by its h,,peia
The drainage effect of young and s aase
growing tree, especially under cond;t;appq
higher temperature of the air, wonId
much greater proportionately to its es..
of leaf surface. @
A swamp is a basin in which water CALI.
from surrounding ground. After heavvvlass ing
there may be an overflow from II as 10y
certain quantity of water per acre ,a aus
determined by the depth of the ba.;n lug ~
water being stagnant. the soil cont.. .s
decayed vegetable matter, at a certa;a ny
perature the conditions are establshsaa
der which the poison called malaria =
engaged and carried by winds to w., \ y
Joining highlands. You will reaa;Ius
that close plantation of young. r.,;s
growing trees would draw up and dissts@a
harmlessly into the air all the water ~
would lie within certain distance ~ y
surface; that they would further a..
delay stagnation of the water in the ~
fetal stratum of soil again by maiats;,Et
by the effect of their shade a lower ~
perature of this stratum; that THU ~
would be increased by the great ev, ,se
ton constantly going on a.. their lspsa
and after all, through their action ~
screen or sieve, any malaria that moS.I
disengaged would be much less likelvSs
spread abroad. Any plants of rapid gu,,
would have all these effects-the sunao,s
the alanthus, the pride of China nj,
willows. The average growth of thai
eral species of eucalyptus which have 9
introduced in California during SIX mana
of summer, even in cool situations and
poor and dry soil, is more rapid than A.
of any Of these, and in this, l imagine =
sists principally, if not altogether, apys
vantage it may have.
1t should be known that the effects NJ,
moving a large number of trees bas 4
quently been to cause a very virulept Il,
of malarial disease to break out wben.
was before unknown. Augusta. Geas
furnishes a marked instance of this. hnS
amples are not wanting in the immeiis
vicinity of New York. The disappears
of fever and ague soon after the sprpsrJ
up of a dense growth of young trees i
alsO been noticed in various localities,
Proper provision for a thrifty growth.
common trees along the principal av.pp
of New York would. as DR.. Stephen Sua
has observed, besides saving many M
strokes, add appreciably to the wssla
the city through the increased capacityh
work which would follow both to hom
and to men and women. Trees cranr I
and starved at the root, as are most Of tiT
now seen in the city, are of little value.
Yours, very truly,
FRED. LAW OLMSTED d,
Manton Marble, Esq.
z. S.-One species of the eucalyptus Q
tains a greater height than any other know
tree, the segnoia OF California not excepa ,
The eucalyptus forests are said to beur
gloomy, and except on account of then
height uninteresting. The young treesm
striking in form and color. but In geusa
planting for landscape effect not taI4
sirable