The National tribune., 1906-01-11

| of trademarks. labels and prints, which
must in all respects comply with the re-
quirements of the statutes.
"(Secs. 1887, 1892 and 1896. Revised
Statutes. above mentioned, were amend
ed by the act Of March 3. 1903.)"
WORK OF THE PATENT OFFICE.
For the week ended Dec &c, 1905,
the Patent Office issued 556 patents, IL
designs, 145 trademarks, Is labels,
eight prints, two reissues: total, TAO. of
which SOC patents and designs and 1877
trademarks went to citizens of the
trademarks to citizens of foreign coun-
tries.
DIR. S. n. MCLEAN, Of Iowa, believes
that he has invented a gun which will
not kick This Is a matter of more i'm
portance, even, than the unlucky man
who has to fire a kicking gun appre-
ciates. The recoiI of field and siege
pieces is a problem of the highest con-
sequence to artillerists. Where a force
of $50 pounds to the square inch is ex-
erted In firing piece, only six pounds
go to the propulsion of the ball. while
the remainder Is expended upon the
gun, and very elaborate and expensive
devices OF water chambers, Oil cham
bers and springs have been employed to
take up this recoil. While these are
possible with heavy guns In position,
they are too cumbrous for field guns,
and consequently the recoil of the guns
Is serious obstacle to accurate firing.
A field piece always runs back some dis
lance upon being discharged. If the
shot has been lucky one. then the
cannoneers try to put 1t exactly where
it was before to repeat their success
which they rarely do. DR.. MCLEAN
calls his gun fool proof" because 1t is
80 simple that 1t is impossible to put 1t
out of order. On the muZzle of the
gun Is screwed a pear-shaped device
with grooves and little vents, which 1t
Is said will take up the gas as it comes
pouring out and use 1t to pull the gun
forward with an energy equal to the
power of the kick. DR.. MCLEAN has
also "knurled' the gun; that is, he has
cross-grained it by series of cuts which
give large radiating surface to prevent
its becoming unduly heated. The gun
has been under test at the Proving Sta
but the experts will not say anything
about its success or otherwise.
The severest test that has been made
OF the wireless teiegraphy is now going
on In following the course Of the dry
dock Dewey, which will be followed as
far as possible In its journey across the
Atlantic by the wireless station at st.
ArlC
the dry-dock are equipped with the lat
est devices in wireless telegraphy, and
SO far they have worked very we'll Mes
sages have been sent 225 miles through
a terrific gale and received as perfectly
as communication by telephone. II Is
expected that the daily messages will be
kept up until the Dewey is at least 1900
miles out into the Atlantic.
An old question among scientists Is
again receiving much attention. TAX
ing as a postulate that power or energy
is as constant an element as matter,
and can not be destroyed. the question
Is:
A coiled spring represents force in
its coiling. and the force goes into the
spring, 10 De again EXPENDED. IL the
spring Is dissolved in acid, what be-
comes of the force contained I'm the
spring?
This is something for theorists to
think out these long Winter nights.
A French scientist recently read a
paper before the Academic as to the
| toxic effects of an injection from the
eggs of ducks, chickens and turtles.
| By injecting a solution from the yolks
of eggs in distilled water into the veins
of rabbits he killed them I'm a short
time. Some died In n few minutes and
| the longest lived two hours. Duck eggs
| seem more poisonous than chicken
eggs. while those Of the turtle still more
| speedily caused CONFUSION and lock-
| jaw. The albumen forming the white
of turtles eggs was found equally DOW
erful
DIR. Sheldon Jackson, the United
States General Agent for Education in
Alaska, denies that the reindeer which
| were imported into Alaska at great ex-
| pcnse are becoming extinct He de-
MES this most positively. and says that
| their introduction has been a great sue
cess. Since 1892 1880 reindeer were
brought from Siberia to Alaska From
this original herd 1925 fawns have
i