The Plymouth tribune. (Plymouth, Ind.) 1901-1911, 1904-12-22
|,klnSSCienCe
|NsIIlvention|
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Vienna, has proven berry successful in
lessening the surgeons work in watch
ing the circulation Of patients under
anaesthetics. 1t consists Of q watch
like box, which is attached to the pa
tents forearm, and with hands that
are moved over the dial by sensitive
pring, very accurately showing the
pulse and lood-pressure vibrations. 1t
wen reveals pulse action 80 feeble that
he finger cannot feel it.
The much-ridiculed name of liquid
crystals" is still retained by DR.. Otto
Lehman, who has published an en-
larged list Of the organic compounds
having the peculiar properties. These
substances, as was first made clear
fifteen years ago, have two melting
points and at intermediate tempera-
lures move freely like liquids, but
polarize light like crystals and show
they are really like solid crystals is
still disputed.
In the survey of the Scottish lakes
which is now nearly completed, n
depth Of LOTT feet has been reached
In Loeb Moran. This proves to be the
deepest lake in the United Kingdom,
and, as the surface is but thirty feet
above sea level nearly the entire bed
Of the lake is below the surface line
Of the ocean. Only seven deeper lakes
are known in Europe, four being in
Norway and three in Italy. At a depth
Of one thousand feet the temperature
Of Loeb Morar is fairly constant
throughout the year at about AZ de-
grees.
Beginning with schools to teach
spinning by hand in the eighteenth
century, Germany has continued to
improve the instruction in textile in
dustry offered to it's people with every
advance of practical science as applied
to weaving and spinning. Textile
schools, where the manipulation of the
most intricate machinery is taught, are
now found all over the empire, and it
Is held by some persons that they con-
stitute the main pillar by virtue OF
which the German textile industry
maintains its competitive power In
foreign markets. The courses of in
struction are frequently revised, and
everything is kept up on a scientific
basis.
1t Is so easy to obtain gold in
q very pure state that it's melt
tng-point is a fact of much prac-
hcal Importance because 1t serves
as constant, or basis Of comparison.
In the measurement of high tempera-
lures. The latest experiments for as
rertaininging this point with exacti-
tude have been conducted in Paris by
Messrs. Jacquerod and Perrot, using
a special type Of electrical resistance
furnace, and a nitrogen thermometer
Of fused quartz. The melting point
was found to be 1852 degrees cent?
grade, or in round numbers about 1853
degrees Fahrenheit. This is about ii
degrees Fahrenheit higher than some
former determinations, but somewhat
lower thar others.
Moved by the apparent loss of tin e
and increase Of errors caused by the
traditional use of Roman numerals III
designating volumes In photographic
references, DR.. r. NJ. Yerkes of Har-
yard has submitted the matter to q
simple scientific test. Choosing ten
well-educated persons, he determined
for each the time required for writing
and for reading the Roman and the
Arabic numerals from l to 100, and
also the relative number of errors COM
mitted. His conclusion is that 1t takes
three and one-third times as long to
write the Roman numerals as the
Arabic, and the chance of error is 81
times as great. 1t takes three times as
long to read them, and the chance of
error is eight times as great An H.
lustration is the numoer SO, which In
Roman style is LXXXVIII. In the
international Catalogue of Scientific
Literature the volume numbers are
printed in heavy-faced Arabic type