The state rights democrat. [volume] (Albany, Linn County, Oregon) 1865-1900, 1886-05-21
POPULAR SCIENCE.


crabs do not reach groat depths In tho
ocean.
The simplest way In which to|
measure the rate OF plant growth II 10
mark lines with jet black India Ink
on roots growing on wet filter paper,
There will be found to be market va.
riatlons Of rate growth, even when
all necessary conditions are seeming
~ the same. Perhaps these depend
on inheritance.
Since Agasslz died ornIihologisis
have discovered, mainly through fos-
slI vemains, that birds ere closely 70.
lated to reptiles in1theIr structure
A iossii bird, discovered In Germany,
has besn purchased by the British
Museum for q small ItIiuIe.
shows 4 body heightened out Into
tall, that, without wings. closely re-
semblsd reptiles body.
Tho supply OF water co plants
through their roots Is always more
abundant when the soil is kept warm;
hence when plants begin 10 wilt, mere
warming tho earth around the roots
will som~litne cause them to revive.
Bur II must be remembered that
roots (except these OF aquatics1 need
air to breathe, aud hence they must
not ba drowned.
Those in charge OF the Harvard
Observatory are engaged In making
systematic Photographic reproduc-
ton Of the stellar ky. A tract ofthe
heavens i5e square Is photographed
ut single exposure, and stars ~
small ~ the 'ixth ma goltude are
clearly shown. Eighteen of,hese In.
pressi0ns are taken on 81 gls plate,
forming map ceveFBeg section ni
he heavens 90 long by 45s wide.
Stars down 10 the eighth magnitnds
are shuwn In photographs of smaller
areas.
Every living, active part q plant
contains a certaln amount of WAFER
From mary jules parts liinesy per
cent. OF watoF can be expoil sd by dr.
log many green leaves held from
seveniy.iivs % eighty. while frnm
seeds which Wa call ssdFy. "lt is ss,eno-
times possihle 10 drive of about cen
per cent. Part Of this watef Il 80 In.
Iimately cnmbsned with the plant
structure, that, II IL IL once expelled,
II cannot be again taken up In such a
manaeT as 10 re-te re the plant til its
former condaboD.
The trzs-fsr Of water through
woody steHas taken place BY means of
the younger wood, and not iO any ex.
teut by he bark. Hence n stem can
re girdlssl, the bark stripped of from
the vound aud set the lesves viii for
q long tLsne keep fresh. In soft plants
the irDnsser may iaks place through
alm0si any parts. Sometimes the
preasnre Of the juices within The plant
IL - greet that water IL forced col
tnEough fhe minute riffs. This Il
ofsn seen Ia the case. of The young
leaves uf wheat aud cnTn, the drops o.
water at The tips looking like dew
but plain ~ coming from within ihs
plant In stead Of frsm the air. In |
few Inst ances water has heen seen q
bs ihrr ,wn out In minute Jets lr,n
the tips nf leaves, especially Ia som'
e the greenhouse rla,us ike Cnloe a
sIa.
Il Tin. mechanical protection fplsnl
sgaInst insects Is secured either 3.
hairs or by somethlng obnoxious :
them, as bitter prlnclple. Whe
Lubbock was studying ants ne Ipuu'
the only barrier which would cnnfin
them was line Il Fur. They couldn
get through that. Nature uses tn
same device, and you may notice
especially NJ his season on the youn
seed leaves of plants. The thicknes
CT The epideI mis- protects the plar
when necessary against injury by lo'
of water. In older growths, a. tee
. we find corky layers, made up Of dea
. cells, containing only air and In
vestiges of what was once living M
: ter. But these cells are waterpro
and mal e life preservsrs forssse plal
: on the same principle on which y
0 construct ours.
Z - 49,
49,. K,dna. traa nnrea ali kidwest trl