St. Tammany farmer. [volume] (Covington, La.) 1874-current, 1891-07-25
PROGRESS m SCIENCE.

HE lnuue0Ce OF 1904 upon the r6V0
Of formation Of carbonic acid has been
made q matter Of study in France, and
It has been found out that during tho
first hour after meal the quantity Of
carbonic acid exhaled increases till il
reaches . maximum, three or four
hours after the meal, when il falls OF
again. Plenty of fresh mir is desirable
from ono to three hours after meal
INQUIRY into the subject Of explosions
IN mines being caused by dry coal dust
has led to some very valuable expert
ments and plans for clearing the gal
leries Of foul air. One of thcse consists
in moving open water butts through the
affected localities. The coal smut col
lects in the water, and the air is there
by cleared before the danger limit is
reached
EXPERIMENTS with strawberries indi-
cate that pollen-bearing is an exhaustive
process, and that larger yields Of fruit
as rule may be expected from those
varieties which produce pollen SO spur
ingly that small proportion Of other
varieties producing pollen abundantly
must be planted with them IN order to
insure q full crop.
A NEW system Of electric railway
signaling has recently appeared in Eng
land, in which, II two engines come on
the same section Of line, bells are au-
toanatically set ringing in each engine
by an electric current. The same mr.
rangem mt allows telephone communi-
cation between the engineers and also
with the signal men.
By q comparison Of records extending
over number Of years it has been con.
cluded that the moon has an influence
in lowering the height Of the barometer
in the months from September to JAM
uary at the time Of full moon and in
raising it during the first quarter. No
effect has been perceived in the other
months.
The English troopship Euphrate.,
illustrates the progress Of marine en-
cheering. She was built with simple
horizontal engines. after which she was
fitted with compound vertical engines,
and now she is to be provided with en-
gincs of the triple expansion type.
THE Hungarian minister of commerce
has under consideration plan for the
fastest train in the weird, to be run on
an electric railway, and to carry pas
scngcrs from Vienna to Budapesth, 15G
miles, in two hours and half.
THE application Of the microscope to
machine shop practice for the purpose
Of proving whether surfaces arc true is
pronounced by experts as being the
best method for obtaining accuracy thus
far suggested.
ELECTRIC power has recently been de-
pended upon in England for a supply Of
phosphorus, with the results, both as to
quality of material and cost OF produc-
ton, that were considered to be EN-.
inently satisfactory.
In its native habitat the shell of the
oyster is always little open, and mi
croscopic. waving hairs set up currents
which carry the food plants To its
mouth, where they are ingulfed and
afterward digested.
In armor-plate tests steel mas gem
orally been found to compete more sue
ccssfully with compound arm',r when
the plates were eighteen inches thick
than when they were only twelve inches
thick.
To ORNATE the waste of steam in
steam hammers an improvement has
been introduced in fitting the hammers
with two pistons Of different diameters,
compromising them in fact.
The French chemists who some
months ago succeeded in making small
rubies have now overcome all difficult
ties, and can make them Of very much
larger dimensions
A NEW theory in relation to the moon
has lately been advanced, to the effect
that the lights and shadows Of the moon
arc incompatible with the the Dry Of its
spherical shape.
An arc lamp with four cArbons ar
ranged radially in . nearly horizontal
plane, but having their centrally meet
ing points slightly depressed. has lately
appeared in Paris.
An instrument called the hamatolxrit,
based on centrifugal action, has been
invented for determining the volume Of
corpuscles present in blood.
In the new Anglo-Frcnch telephone
cable the four cores are wound around
each other in q spiral or strand to obvi
ate the effects Of induction.
THE effect Of removing tassels from
torn is to turn the strength of the plant
to the ovarics, and SO produce = larger
amount Of grain.