The Washington times., 1916-10-02
IFT may be iikensd TO q stream
OF water from the nossie Of q
ftibhAe hnsn yUhak a aanffnO0fi a

IFB may be likened 70 q stream
Of water from the nossie Of q
rubber hose. What ID continuous
~ lost at the forward end In sup-
Piled from the other end-as long a.
pressure, quantity. and supply ars SUI
hcient to make up the loss from waste,
friction, use. disruption, destruction and
evaporation.
From the primevai period. when the
memory OF man runnsth not TO the con-
trary, Il has been obssvsd that many
living things regenerate lost parts. A
pruned tree regrows It's branches. a
small cutting OF rose bush becomes an
entire plant. shaved hair grows out
again. q lost niger nail is often regen-
Grated. and n new rib will take the place
OF rib removed TO make part OF the
fractured skull. an absent nose or a
broken spine. The stays antlers fall on
and are reErown every year. scientists
paid no attention TO such signs OF regen-
Then Prof. Trembly discovered the by
dra, a many-headed polyp found IN fresh
water. which he noticed could be multi
Piled and regenerated indefinitely by
The great biologist spailansoni. show
ed that tho earthworm cut by a spade
in tho garden sometimes regrew new
head and new tall and thus became
two creatures.
Regrswth In Animals.
At present there 10, AZ Prof. J. Arthur
Thomas says, "a boom In experimental
work bearing on regeneration" These
Phenomena have taught Psychologists
more about human. animal. and plant
| development than was ever known be-
fore. 30 many remarkable facts have
/ N NA hnnLa lectures
only q few years old. IL taken literally,
Will mislead readers,
Half Of a highly complex animelcuie
can quickly regenerate missing hali
| OF It's anatomy. Even minute slices cut
on are capable Of regrowins quickly In
to a whole animal, From one nat
worm-a Planarian--eix or more new
worms may be produced by pieces cut
arm or a lost arm can grow into a COM
plete. new stArnsh. Even crabs can te-
| grow lost parts OF their bodies. II fou
cut the eye and horn from snail any
number OF times. Il will be re-created
over and over again with a perfect eye
tail. a stork Its Jaw, and the newt can
redevelop the lens OF Its eye. Legs oil
| salamanders. nevis, and other amphibi-
ans. IL cut on. win grow out again. and
may even go further and grow an ex-
cess limb on the untouched side.
AZ Prof. Thomson has emphasized
studies upon animal life gives much
knowledge about mankind. 1T In al
\ ways a step toward understanding &c
bring one kind Of phenomenon into LIND
with others"
Embryos or unborn creatures otter
have the power to do much more thar
In required. Even In fullsgrown humans
worn-out skin. nails, bones, hair
| glands, corpuscles, and other tissues
and nerves are all steadily replaced b,
continuous growth. To meet the erfer'
gencies OF normal life, wear ana tear
regenerative processes are ever at worK
What Is Necessary.
Among singing, animals. anneiida,
| polysoa and tunicates there is often q
natural loss OF a part Of the parent
which becomes a whole new animal.
A relict OF glacial conditions, a north.
ern form, which abounds in the Alp;
and the Hill streams around Bonn. Is
worm, which develops without sexua
life. or 1000 examined BY Prof. voigt
not one was sexual II muitiplies bS
A fragment OF the liverwort will ~,
6egonia leaf win develop into root. stem
with an eye" has the same capacity.
"oelr' Of a sponge will do likewise.
Regeneration as a rule tends to b
which are most liable to injury. Tn,
are regenerated. Cocks In fights los