The Morris County chronicle. [volume] (Morristown, N.J.) 1877-1915, 1904-01-29
SCIENTIFIC NOTES.

Oxygen has been obtained from
liquid air by distillation, the nitrogen
passing off first.
Radium has been found to have a
distinct but variable influence on the
growth of tadpoles, development being
slowed, quickened, or perverted.
A sheet of silver is the dressing APP
piled by DR.. Reboul. a French physi-
clan, to wounds. 1t has remarkable
antiseptic properties, and fresh
wound heals quickly without suppu-
ration, while chronic ulcer becomes
gradually covered with healthy skin.
In late experiments of Jensen, iso-
lated cancer cells retained their yitali-
ty for 18 days at degree to degrees
O., Il days at room temperature, and
Iperished in "a hours at body tempera-
ture. Bright light was rapidly de-
|structiye, as was also carbOlic acid.
Il An alternating current of high
Frequency is used by DR.. J.. Cunning
ham Bowie in the electric treatment
of consumption. The curative effect
was noted much more quickly than
with the antiseptic oils alone, and the
experimenter is satisfied that the cur
rent has an important healing inffu-
ence.
The novel drilling tool Of Charles
Simmons, of London, enables one man
to do mining hitherto requiring two
men. Toan iron upright OR spreader
bar, about feet inheight, isattached
small cylinder, and an ordinary 2
| foot drill passing through this cylin-
der is held in rigid position by a power
full spring and grip lever The drill
is revolved by foot lever working in
conjunction with piston. M FL
While hydraulic cement from blast
many years ago, the industry does not
seem to have become permanent. The
manufacture of Portland cement from
Stag and limestone has now been be-
gun in Germany and Belgium, and the
product is claimed to be cheaper and
more trustworthy than that from the
usual materials. Mortar of one part of
Stag cement to three of sand had a
tensile strength of 1888 pounds per
square inch after days, increasing to
551 pounds in % days.
A still unexplained effect of the
electric light somewhat resembles
mild sunburn and sunstroke. The
heat of the electric arc employed in
the reducing furnace is soconcentrated
that it melts steel like tallow, but the
thermometer a dozen yards away is
scarcely affected. Even at this dis
lance from the heat, however, persons
experience a burning of the face and
other exposed skin much like that pro-
dnced by intensely hot sunshine. The
skin becomes deeply bronzed, and
there is temporary blindness in natural
light, with pain in the eyes, followed
by headache and insomnia.
/ To train deaf mutes to hear and to
measure their sense of hearing have
been subjects of experiment in Europe
/ by DR.. Marage. A siren giving vowel
sounds was used, and the intensity of
the sound as it became audible be-
came progressively less, many cases of
complete deafness being thus made to
give place in six weeks to the power of
hearing ordinary sounds. The treat
ment proved to be pleasing instead of
| fatiguing or painful. The hearing
was measured at different stages of
the treatment by the air pressure
necessary to make the siren audible
and the results were claimed to indi-
cate that few persons are deaf and
dumb beyond all cure III