The home journal. (Winchester, Tenn.) 1858-188?, 1875-09-02

49, 'fFf''F fftHf' 'Fs'
RELATIVE INTENSITY or VARIOUS CoLolEI
LIGHTS.
The Photographic News notices q
length tho experiments recently mad,
Mt Trieste TO determine the relative in
tonsity OF various lights. These test
were OF II practical character, and were
conducted with II view to establish th,
value OF colored lights in lighthouses,
The first place was given to tho whit,
light, then came the red and green. AT
half II lcagiIo's distance tho dark blue
lantern was invisible, and the decp-blue
nearIy 80 ; and ID was observed that Mt u
certain Instance ID was easy to confuse
the green with tho white; hence, the
authorities mt Trieste recommended
that this cOlorcd lantern be only used
IN the vicinity Of the rcd md white.
FIXING rRUssIAN- BLUE ON FABRICS.
Schenrcr, of Berlin, recommends for
a dark shade fifty parts of t~arIaric acid,
ono hundred and ninety parts of am
monia, II hundred and ten parts Of
dry, powdered Prussian.blu and one
hundred and fifty parts of water, with
the employment Of n gentle heat to
hasten solution. In dyeing, the ma
terial IL passed through this sol
ution, and then after driving,
through an acid. For printing, nm
equal weight of thick tragacanth water
ia added to it, and the material. after
printing and drying, which Immediately
changes to blue on contact with the
acid, and IL almost completely fixed,
remarkable little being lost in washing
nTD |CopPUsCLEs IN BLOOD.
M. MnlaaseH has contrived an inatru
mGnt which il said to DO superior /,
those previously used for ascortnininl
the number OF red corpuqcles in a givcI
amount Of blood. II consists of n cnp
Hilary tube, into which blood and nrti
heal serum are introduced, and whicI
aro graduated 80 that the contents OF d
gwen length are known. The main
number of rcd corpuscles in human
blood IL discovered to be 1000, 900 in
each cubic millimotre. A greater num-
Der Is found in smaller arteries, and
most in the veins that have lost part of
thelr serum by oxoemose. They are
ewe IN cases OF cancer and tubercu.
lose. Lend poisoning also lessons their
number.
r'i hh'iAil oND
Certain interesting facts, and of an
order suggestive of further inquiry,
were recently presented by DIR. q. l.,
Phipson. They relate to the interest
ing phenomena of intermittent ebnlli.
ton, and OF the instances cited was the
following: When water strongly acidi.
nod with ~hydrochloric acid and con.
tanning a small quantity OF benzole was
heated, 1t was found to enter into VIC.
lent ebullition every sixty seconds. AT.
ter n while this action oeEsed altogether.
and then recommended, the intervals
then being only thirty seconds, which
intervals IN turn were again reduced
first to twenty, then ten, and fiually
eight seconds. TGe temperature OF the
vapor in the flask remained constant al
10l deg. O., and that of the liquid al
1893 deg. G.
SEWER GASES.
A practical and effective contrivanc,
has, it il stated, been introduced il
Paris for getting rid Of the noxiout
gaseB OF sewers, its arrangement and
action being as follows: Connected
with the main sewer is a Pipe two inches
IN diameter, and at the top OF the pipe
IL a ball no fixed that it allows an aper.
ture OF a quarter OF an inch all round,
through which the gas may Oh.
cape from the pipe. Running up out.
side the large pipe is on ordinary gas
pipe, and just underneath the ball, at
the top Of the sewer pipe, a set Of burn
ners is 80 arranged that, when lighted,
they make n complete circle OF fire.
The ball prevents the sewer gas from
rising through the centre, aud it cannot
pass through the fame, which entirely
surrounds the aperture. The conso
quence is that the sewer gas minglef
with theo ordinary gas and il consumed
adding, 1t is said, greatly TO the bril-