The Baltimore County union. [volume] (Towsontown, Md.) 1865-1909, 1907-07-27

Csravndmes Baltimore County Uason.
SCIENTIFIC MISCELLANY.
me First r.ife-A New death rest-A FLY
Parasite Of Rats-The Gliding Boat
Cork from Ce11uloee- Consumptives
That Grow Fat-A Family with Many
Teeth Dissolved 0ae--Tonsorial Sani-
n tation-A Needed Invention.
The beginnings Of life have been lately stud
led b. Miss Rina Monti in some Of the newer
lakes OF the Alps. In the Lake Of the Seracs,
which has been formed within the memory Of
resent inhabitants. only five species Of life are
plants, four being diatoms. In Ong and Tig-
49, tWgr older lakes, animal forms-feedIng
upon the diatoms-have begun to appear. The
observations make It evident that life in q lake
begins with diatoms that absorb the carbonic
acid dissolved in the water, and that the next
stage IS the development Of simple animal
organisms. like rhizopods. that subsist on vege-
table forms already existing. Biologists have
inferred that the first life on earth began in the
ocean in this same way.
sss
Anewly-suggested test Of death-claimed tobe
infallible-depends upon the alleged fact that
hydrogen sulphide always forms in the lungs
within twelve to twenty four hours after death
and finds its way out Of the body through the
air passages The presence of the gas is de-
termined by placing IN thenostFil of the sup
posed corpse piece Of absorbent paper mois-
tened with solution of lead acetate. The paper
IL blackened by any trace Of the gas, but re-
mains unchanged If life still fingers in the body.
-
The new fly Of East Africa, described by W.
Donitz a. CordyIobia murium, was discovered
By DR.. Robert Koch as parasites in the skin OF
rats suspected Of plague. Flies Matched from
the maRgots in just one month. 1t is supposed
that the eggs are laid in the earth, and that the
larvae attach themselves TO the parts OF the rats
touching the ground. Larvae Of another fly Of
the same genus are found in boils Of railroad
builders M Guinea.
The new gliding boat made In Paris by Leva-
vssseur and Lem consists essentially Of light,
pointed main section, which Is connected By
n6ht wood platform two feet long to large
AT tail thirty feet long. The forward section
contains the motor, from which shaft runs to
: the propeller In the tail. The rear end OF the
tail Is almost submerged, while the forward end
end the main boat float on the surface and are
almost lifted out Of the water by the action Of
the propeller. The new fifty horse power eight
cylinder Antoinette rotor is used. In calm
weather, the new form Of boat glides very rapid
water-thIs being the special advantage claimed
over sliding and ordinary boats-it isable torun
at fair speed.
The artificial cork of recent French patent
Il made Of q mixture Of amorphous cellulose
lpIth Of rushes. powdered cocoanut shells. or
papor pulpl, nbrous oellulose (thistle-dow tex
tiles, or esparto pulp). and agglutinating cellu-
Lose solution Of nitro-cellulose). Glass-lined
mouIds with small holes for the escape Of va
pors are used to shape the pasty composition.
The volatile solvents Of the nitro-cellulose are
evaporated, the corks are removed from the
m0ulds and the nitro cellulose is denitrated by
reducing agent. The finished material Is given
resistance to water by dipping into tungstic acid.
Tnberculous patients that live and grow fat
are reported by DR.. Guilhaud. French physi-
clan. He has found q form of tuberculosis that
remains in the condition Of o local lesion, is
usually associated with an excessive deposit of
adiposs tissue. and is durable. He believes it
arises from implanting attenuated Koch bacilli
4 IN 90 called scrofnlous persons.
a.
while the average man is satisfied with
maximum Of 50 teeth, a Turk near Baibnrt, in
Asia Minor, boasts Of As. all perfect. He belongs
70 3 well-toothed family. his mother and sister
each having the same number.
50
Acetylene is now carefully purified. washed
and dried, and stored in cylinders in dissolved
form. safety in using the compressed gas being
thus ensured. Cylinders Of any desired size are
Allied with such porous absorbent as abestos ora
special charcoal cement, making explosion in
I the cylinder impossible, and the porous material
IA then soaked with fixed quantity of acetone,
volatile organic liquid having the peculiar
1kopsrty OF absorbing twenty five times its own
volume OF acetylene at atmospheric pressure
and coz F., and greater proportion at increased
pressure. IN practice, the acetone is so regula-
TED In quantity that the cylinders contain ten
times their own volume Of acetylene for every
atmosphere Of pressure. The compression be-
atmospheres, the cylinders contain 100
heir own volume Of acetylene. or ten
norc than when the undssolved gas is
sed in the ordinary way.
ass
e Of sanitary hairdressing establish
Ia penalty to comply with the regu-
y. e plan Of the health officers Of Buda-
pest. Among the observation-disclosures Of the medi-
cal adviser are that regular customers should
provide their own toilet requisites, that all
shelves and fittings should me made Of glass,
that the use of puffs should be discarded for
better method Of applying powder, that bar
Der or haifdresser should refuse to attend GUS
toner apparently suffering from disease ofskin
or hair. and that all razors and combs should be
kept 1--WE minutes in five per cent solution OF
sodium carbonate. Ladies' hair-curlers and
tones would be boiled ten minutes.
srs
A safety appliance for the hand which is 9
great mechanical need. in the view of Prof Kapp,
Of Birmingham University. The danger is not
50 much in the blow the operator may receive
Is in his liability to be knocked OF his balance
and fall when working at considerable height. |
ROBERT CLARK. A. w. CLARK. |
LuTHERvILLE