The Penn's Grove record., 1882-03-11
Popular Science.

Inc use vi green OF uainp fuel OF an
t sort IL very Improbable. A larg
8 amount Of the heat which it woulC
: yield II dry is absorbed and lost in tn.
4, evaporation of the sap or moisture.
DR.. Luton, of Rheims, reports tina
! he has discovered that the ergot Of rye
associated with phosphate of soda pro
, duces on those to whom it Is admins
tered a hilarious excitement similar t.
: that which is brought on by laughing
gas.
When oil Is heated sufficiently in s
closed vessel, from which the air is
excluded, 1t turns to gas, which occu.
pies many times the bulk that the oil
did. This is the philosophy of pop.
corn and explains its tendency to
burst into curious forms on being
roasted.
Al meeting of the American Asso-
citation of Window Glass Manufac-
turers lately, In Washington, the
product OF the past year was reported
to have been nearly 2,250, 900 boxes,
valued at about %, OOO, 900. The de-
mand for consumption has taken the
entire product.
The Prefetti of Italy have been in-
structed TO use all their influence to
prevent laborers from going out to
Panama. There are more men on the
isthmus already than can be employed
and II is the intention of those In
charge Of The canal excavation TO de-
pend mainly OF Cinnamon.
The best disipfecting agents, Accord
Ing to Mr.. W. NJ. Hamlet, are in gen
eral those capable of exerting an
immediate and powerful oxidizing
action, and that it is active oxygen,
whether from the action of chlorine,
nitric oxide, or hydrogen peroxide.
which must be regarded a. the great
est known enemy to bacterial life.
Gas filters have recently made a
most useful application Of pllotogra-
ply. They photograph the gas flames
given by different burners or Jets so
that q customer can see if the shape
and form of a light will suit him be-
fore he gives his order. AS the flames
re moreover depicted 'llfe-sizen the
purchaser can always tell whether his
jet is up to the standard.
1t is suggested, with a view of avoid.
ing the bursting of water, pipes by
freezing, to make them elllpticaI In
section. As the water expands to
form ice, 1t will alter the shape of the
pipe, causing Ii to become circular il
section, and therefore giving more
room for the Zoe. 1t ia proposed TO
squeeze the pipes into theil original
shape, when, by r succession of irosts,
they have been rounded.
Lee Mondes reports that NJ. Bufour-
Get has In b exposed court OF his
house two bars of iron planted in the
earth, to each OF which is fixed a CON
ductOr of coated wire terminating Ia a
telephone receiver. He eOnsults the
apparatus twice or thrice every day,
and 1t never falls through it's indica-
tons of earth currents to give notice
of the approach OF a storm twelve to
fifteen hours before il actually arrives.
In Remnants process for II ndering
cloth waterproof the fahri3 is passed
slowly by machinery through a tank
divided into three compartments, the
first containing a warm solution of
alum, the second a warm solution of
lead acetate, and Il ethird pure water,
which Is constantly renewed. The
cloth on passing from the latter is
brushed and beaten to remove the salt
adhering to the surface, and finally
hot. pressed and brushed. In this case
lead sulphate is deposited on the
fbres.
TO prevent the cracking Of cast steel
In hardening, a correspondent of the
Metal Ar6efter places the article first
In a tin box, where 1t is packed with
clean wrought iron drillings, and,
after luting the box carefully, he heats
the whole slowly to a dark red heat.
After cooling 1t very gradually he
finds thst all internal strains which
otherwise. would have developed
cracks IL h tool during hardening
are removed, and when steel to be
hardened is thus annealed no further
trouble Is experienced.
Professor Let'our, of Newcastle, In "a
paper on the geological distribution
OF endemic goitre In England, has
shown that the conditions of the prev
alence of this disease are substan tally
the same as they have been shown by
the researches of DR.. de st. Lager, of
Lyons to be in France. In both
countries the formations in which the
most goitre Ia supported are both cal
caleous and metalliferous. Metsllifer-
Qua impurities alone do not promote
the disease, for the Devonian and
granite formations are free from 1t.
The absence of limestone alone does
net prevent it, for 1t exists on the lig-
utttierouS oeus VI raucet huu the Ter
r~ugtnous sands OF the weald. DIR. de
81. Lager believes that endemic goitre
comedies with metalliferous deposits,
OF which iron pyrites is most active.
Sir John Pope H~ennessy, Governor
of Hong Kong, says that during the
past four years thousands OF persons
have been vaccinated In China. AT
first he was puzzled to account for the
fact. He found out, however, that the
native doctors ofthe Tungwa Hospital
"a charitable institution ar Hong
Kong, supported by Chinese contri-
butions-wsre in the habit not only OF
vaccinating their eountrymen there
but of sending men to vsccinste per