The Democratic press. [volume] (Ravenna, O. [Ohio]) 1868-1901, 1880-10-14
POPULAR SCIENCE
Banca tin is the best that is made.
Iron is fibrous; gold is crystal

Banca tin is the best that 1s made.
Iron is fibrous; gold is crystal
line.
Nothing is more common than wa
ter cisterns lined with lead, although
they form most dangerous element
to health, especially when new.
) Nincty-one per cent OF coal dust ce-
mentcd with per cent OF pitch con-
stitutcs the elements of pressed fuel
manufactured at Port Richmond,
Philanelphia.
For the manufacture of opal and al
abaster glass the following mixture is
now used: Feldspar, 20 to 78 per
cent blue lime, IL to go per cent and
heavy spar, to 40 per cent.
Covering the pulleys with leather
will add largely to the power of belts.
In many establishments where there
is deficiency of power, the effects of
such an improvement would astonish
those not acquainted with its value.
In attending to the phenomena of
vegetation it has long been demon-
strated that the presence of light is
absolutely necessary to the health and
proper growth of vegetation. The
same fact applies to human beings.
An experienced ,physicians says
when you wake In the morning rise
and dress at once. Never lie and
'tdroWse." There is no refreshment
to be derived therefrom. There is
vigorous tonic in the morning air.
Mr.. w. a Lloyd, OF the crystal
Palace aquarium, London, states that
during an experience of twenty-five
h..
where any marine crustacean of any
kind, suc b rs the crab or lobster, for
example, has been reared to an adult
condition In an aquarium.
N. A. ,Mouchot says he has been
able, on . practical scale, to utilize
solar. heat directly in number of
chemical operations, such as the cal
cinatiOn Of alum, the manu- ufacture OF
benzoic acid, tho distillation. Of sui
phuric acid, the production Of wood
charcoal in closed vessels etc.
Galloway says that the most effec-
tual way Of preventing disastrous ex-
plOsions In coal mines where there is
not much firc-damp,l but where there
is vast quantity Of dry dust, is to
keep the Aoor of tho mine continual ly
Wesswit water alone, or with Q weak
solution of calcium chloride. te M
M. Trouve has made an improve
ment in Siemells' bobbins for Dynamo
electric machines. He makes the po-
lar surfaces OF snail form, so that tho
surfaces approach those of, the mag
net gradually till the moment that
the posterior edge escapes from the
pole and repulsiOn commences
= NJ. Fautrat has been convinced. Ly
his studies of the influence of forests
upon the moist, currents that pass over
them, that pines and other needle-
leaved trees have strong attlaction
for tho vapOr of water. He believes
that the rcsinOus trees transpire twice
as much as other trees and has also
observed that when they are exposed
to moist air they absorb vastly more
water than the latter. ELS g.s ifa..
According to T. Nerlinger. the, di-
rect application of peat to sandy soils
does not give such good results as to
allow of dispensing with other Kind 8
of manures, although the yield is
greater than if the SOIL had not been
inanured at nlL. He recommends that
before use the peat should be first
mixed with lime and stable drain
ings. A s4.7ttt5. s.''i'i''i = aiAs s'iI
Photographs have been obtained by
j. N. Lockyer OF the spectrum OF
carbon III oxygen and in chlorine
which correspond with the supposed
carbon lines III the solar spectrum
The carbon lines in the solar. spec
trum are not reversed, showing that
the vapor exists at lower temper
ature and pressure than the metallic
vapors in the SUMS atmosphere. 1t
must, therefore, exist above the chro-
mospherc. .... .t.-,..,.,-.i