Evening star. [volume] (Washington, D.C.) 1854-1972, 1926-12-31
BIOLOGY

III. JdllleS -. sumner OF C0fn6u
| Medical College isolated and crystal.
lied the first engine, urease.
A death whisper" consisting of
highly intense beams of sound
waves, too short to be audible, at fire.
quencies as high as 100000 per second,
was shown by Prof. r. w. Wood and
A. l.. LOOMS to be capable of killing
certain small animals and plants and
to have other strange biological
effects.
The human body grows in three dis
tinct spurts, DR. Charles B. Davenport
of the Carnegie Institution of Wash
ington told the National Academy of
Sciences.
Eyes of an embryo chicken removed
from the egg and planted in a culture
medium continued to grow and develop
in "a surprisingly normal way" &C
cording to two British psychologists,
DR.. Fl. 3. Fell and T. S. P. Strange
ways.
The theory that vitamins have op-
posites, "toxamins," which occur in
certain foods and prevent proper bone
formation and cause serious nervous
diseases. was advanced by Prof. Ed.
ward Mellanby of Sheffield University,
in England.
An 11-day-old human embryo, the
youngest human specimen ever avail
able for observation, was studied and
described by DR.. George l.. Streeter,
embryologist of the Carnegie Institu-
ton of Washington.
The mystery of the giant cells in the
blood. which are present in tubercular
conditions and some other pathological
cases, was solved by DIR. W. II. Lewis
of the Carnegie Institution of Wash
ington, who announced that these cells
are formed by the fushion of a num-
Der of white blood cells.
An international school of fisheries
was inaugurated at the University of
Washington.
fly imported from Europe to help
save New England shade trees from
two insect pests was found to be an
enemy to 80 other insects as well.
White pine blister rust, which has
for several years been devastating the
pine forests of the East, was dis
covered to be threatening the white
pine stands of the West.
New harvesting machinery was
invented to combat the spread of the
European corn borer.
Individual cells that have lived for
as long as two centuries were dis
covered in Arizona cacti by DR.. D. T..
MacDougal.
Plants will respond to strong light
if it is flashed on them for as little as
one one-thousandth of a second, DR..
F. A. f. c. Went of Utrecht. demon
strated.
Suction powers in vegetable growth
as high as 500 pounds per square inch
We're demonstrated by DIR. A Ursprung
of the University of Fribourg, SwitZer-
land.
The discovery that plants, as well
as animals, have in their cells the spe-
cial bits of living matter known as
the sex chromosomes was announced
by DR.. Kathleen B. Blackburn, British
botaniSt
The popular idea that big seed are
better than small ones was exploded
by the experiments of DIR, Felix
kotowski of the College of Agricul-
ture at Warsaw, who showed that size
of seed has no effect on the size of
vegetables.
The relationship that plants bear to
each other as branches of the evolu-
tionary family tree was demonstrated
by means of serum chemistry by Prof.
Karl MeZ and DIR. II. Zeigenspeck,
German botanists.
Luther Burbank died April II.
Plants living for months in hernet.
ically sealed glass bulbs were exhibited
to the National Academy of Sciences
by Raymond II. Wallace Of Columbia
University.
Authorization bills were defeated in
Louisiana and Kentucky.
Mississippi enacted an antievolution
law.