The Worthington advance. [volume] (Worthington, Minn.) 1874-1908, 1875-09-10
VALUABLE. INFORMATION II n

S..,r, j5.TS
LA, called iinterasibio ink is prepared.
q, I part by weight IF lampblack, r. of
potash water giassj; .offI the; consistency ST
'sy1p:l iof ammonia / wa4er,s and 80 Of.
distilled water, J. s: H., .ss~..: /. S..=5s
f'z9 ads BLgCrR1C ACTION ON PLANTS. s,.: +
n Having observed that the discharge
:frQm,a powerful electrical machine. pro-.
duced remarklh ss.ls changes n the color 81
plants, NJ. Becqderel ascribes. this result
to the rupturingi0f the cells containing
the coloring .smatter.ts This opiniont3is
sustained blythe fact; thatwhen the ,cellu-.
lar envelope IS washed d the h leaf becomes
WY ra FL a RELIC. '.s: :1.'.
A small image 81 human head carved cal i
ID stone, which Was dug Us on farm iii
Webster township, Mic6.!, some years ago,
was exhibited At the y Detroit meeting Of
the American association. It appears to
90 made Of Potsdam red sandstone, which
does not exist IN nature in that part Of
the country. The features of the face
are OF an Egyptian cast D. B. -
THE Velocity or rRANsx1ssioN OF MAGNET
-: "'i3 >:H .. NM. 81, ~ 800. j. r.,
l., n order to remove sall doubt as to the
accuracy Of the results Of preceding in:
yllestlgat0rs, Dr. Herwig has. sought to de.
termine., the velocity of transmission Of
magnetic influences by separating the var
'oos: portions of his sppar atus to very
considerable distances; and he concludes
that 1.-THE action of the terrestrial mag
inetism really possesses a definite velocity,
1t must>amonnt to- at least q half million
miles per second; or, in other words, that
the terrestrial magnetic influence makes
itself felt at any point of the. earth's sur
face in less than one thrce-hundredth Of
second: ...-.> ,,,,,;,.
-; r,,..:, SOLAR SPOTS.
80, Gauthier states that as the result Of,
three and ! half years Of observation OF,
the soaarI phenomena, by means Of the
equatorial as the observatory:at Geneva,
kindly put at; his disposition by Prof.
Planamour, he finds himself entirely Jus.
titled in coinciding perfectly with the
theory Of Zollncr US to solar spots being
scorise floating upon the liquid, and pos
IDLY even within the denser, gaseous por-
ton of the solar, surface. They are ap.
parently the result of cooling, depending
on the radiation from the surface Of the
sun and this explanation Of Zollner, is
the only one that seems to him not to
contradict both ordinary laws of physics
and Well!knOWn facts. f''r
BLACK STAIN IN IMITATION OF EBONY.
An excellent black varnish, which gives
the effect Of ebony to walnut, apple or
pear wood, especially when free from
veins, is prepared by, first boiling 400
grammcs of nut gall, 100 grammcs 'cf
rasPed Campeachy wood, 500 grammcs of
vitriol. and 50grammes of verd,gris, with
a suitable quantity of water. This is to
be filtered while still hot, and several ap-
plications are to BE- made to the wood.
Aftcrward two or three layers of the fol.
lowing preparation are to be applied: 100
grammes iron filings dissolved in IS cen
filters Of acetic acid. Each application
is to be allowed to dry before another is
made.
TIDAL INFLUENCES on. THE EARrn's RorA.
TON.
Mr.. Tylor, in some remarks on a new
theory OF tides and waves, advocates the
vicw that the level ofthe ocean is nearly
represented by high-water mark on coasts
and boys where there is free access Of
the tide, or in a channel without con.
slant flow. He states that he entirely
disbelievcs in tidal action having the
smallest effect on the rotation Of the
earth, and that the assumption of a great
heap of water travelling in one direction
is gross error. He also suggests that
some geological difficulties, such as the
evidence that tides during the quartenary
periods were three or four times as large
as at present, may be explained by peri
odic changes Of position of part Of the in.
terror Of the earth, rather than by sup.
posing great changes in the distance Of
the moon from the earth.
DETERMINATION OF OZONE IN THE AIR.
The determination of the quantity of
Q zone in the air has not yet been achieved
by any convenient method, since the tint
OF the ordinary ozone test papers is de-.
termined by the velocity of the wind. It
was supposed by Won Pettenkofer that
the absence oil, the ozone reaction in the
atmosphere Of closed dwelling rooms was
due to the slight circulation in the air.
The subject has, however, been fully in
vestigated by Wolfhugel, who finds that
while given quantity of fresh air yields
q very visible ozone reaction. yet 10 or
IL times that quantity taken from the
interior Of dwellings produces no effect
even when the rooms are unused, having
previously been well aired. -Wolffhugel
has also shown that there is great ab.
se1lce of ozone in the air near the ground.
ELECTRIC LIGHTS IN SOLID BODIES.
Cadogan Morgan, in 1855, was the first
experimcnter who produced the electrical
light in the interior of solid bodies. He
inserted two wires in wood and caused
the spark to pass between them. The
wood was illuminated with blood red or
with yellow light, according as the
depths at which the spark was produced
was greater or less. Many of our readers
have doubtless seen an egg or a series of
eggs lighted up by being placed in the
line of discharge Of a Leyden Jar. An
ivory ball, an orange, or an apple may be
illuminated in similar way. According
to Tyndall, lemon is especially suited to
this experiment, "dashing forth at every
spark as spheroid of brilliant golden
light. The wires used for the discharge
should be brought within about half an
inch Of each other inside the lemon.
MANUFACTURE OF MER1No GOODS.
An: English journal says that goods
made entirely Of cotton are called merino,
md have the look Of merino, owing to the |!
~oolly surface impaired to them. Such |
goods are sold both in the United States
md in the Spanish Sonth American mar.
kets in large quantities, especially in the