The Penn's Grove record., 1883-12-08

attention OF the German Government.
IL causes any objects 10 which il may
be applied to become luminous, and
water ia a glass vessel may be convert
ed into an illuminating fluid by the ad-
dition of some Of the powder. The
new nluminant no oxygen,
which fact makes it desirable for use
in m king operations. Its illuminat-
ing power lasts eight hours, when a
new supply Of powder becomes neces-
sary.
The Paris Society OF Agriculture and
I~nsectology, whose exhibition of pre-
served insect specimens has Just closed.
proposes establishing u meLagarie Of
living insects, and thu city of Paris
has contributed q considerable sun in
aid of the project.
The now famous fossil footprints
found last year at Carson, Nevada,
and supposed to have been made by
prehistoric human giants, are regarded
by Prof. o. C. Marsh as probable
tracks of a large sloth. 1t is stated,
however, that DIR. Hardness still insis 8
that the impressions were left by a sIe-
cies OF man, and that he finds his theo-
ry strengthened by fresh discoveries of
tracks.
A Vienna scientist has perfected q
remarkable modification If the micro
scope, TO which the name OF CASTRO
scope has been given. II is to be used
for looking into the interior of the hui
man stomach. 1t consists of a tube
about 26 inches long and half an inch
thick, bent at an angle Of $50 degrees
at about one-fourth of its length from
the lower end. At its lower extremity
is an incandescent electric lamp for
lighting up the stomach, and a micro
scope objective. Prisms are arranged
to reflect the inage-bearing pencil of
light along the tube and past the bend
to the eye-piece. Provision is made
for a circulation of waite about the
lamp to prevent incoHvenient heating.
Photography of the stars now forms
an important part of the work done at
the Harvard Observatory. A region
of the heavens 10 degrees square is pho
tographed at a single exposure, and
eighteen of these pictures may be TAX
ca on a single plate. A map is thss
made Of a section Of the stellar vault
80 degrees long by 45 wide, showing
stars down TO the fifth and sixth mag
nitudes. Smaller stars. down to the
eighth magnitude, are shown in photo
graphs of smaller areas. The magni-
tudes indicated by the photographs do
not always correspond to those record
ed as the determinations of eye obser-
vations. This is due to the effects of
different colors among the stars. A
red star, which may appear very bril-
liant to the eye, produces only d faint
impression on the photographers plate
Late observations made at Lausanne
Switzerland, have shown that al init
matt connection exists between the
electrical condition OF the atmosphere
and the weather; and it is thought
that an intelligent use of registering
electrometers may enable meteor0lo-
gists to forecast the weather several
days in advance. The electric tension
of the air is strong during fine weather
but its rapid weakening indicates the
approach of a storm
Prof. Edward Hall considers that
throughout the early geological epocbs
known rs Archalan, Silurian and Car
boniferous, the sea covered North
America, the British Isl - and West
ern Europe, while a large part OF the
North Atlantic area existed as dry
land. He urges that If his conclusions
prove to be well grounded the doctrine
of the permanency of oceans and conti-
nehts, rs tested by the case of the
| North Atlantic, must be discarded.
A method vf adulterating milk by
| adding to it q solution of commercial
glucose has been exposed by Mons.
Krechel in a communication to the
French Academy of SCIENCES As the
solution has the density Of good milk,
the adulterati II is not detected by the
| nrd1nar, fesfiun ind rnnenfs