Sacramento daily record-union. [volume] (Sacramento [Calif.]) 1875-1891, 1884-01-19
SCIENTIFIC NOTES.

a man breathes about twenty times in a
minute, or 1000 times in an hour. He
breathes about eighteen pints of air in a
minute, or upwards of seven hOgshead in a
day.
DR.. Ragori applies the tuning fork,
while vibrating, over the course of the
painful nerve. The sitting usually lasts
about hall al hour, and the patient Is
generally relieved without further treat
ment. He records his meyhed in the CjaH.
Ian and Gin.
Says European exchange SO confident
have an engineering firm in Glasgow, Scot
land, become in the belief that electricity
is to supply the light Of the future in large
establishments at least that they have not
caused a single foot of gasPipe to be laid in
the new bullling they have erected for
carrying on their business.
To person of weak organization little
sleep in the middle of the day is beneficial
If taken after dinner it should not follow
the meal Immediately. II were better to
adopt late dinner hour-say 3 o'clock
and take the nap before eating. a debili-
tated, nervous system will generally be
benefited by such practice.
The coloring matter IN the skin of the
grape, according 10 the experiments of Dr..
f. Ganttner, is soluble in q solution of tar
taric acid or cream of tartar, and the solu-
blity appears to increase with ths temper.
ature. This coloring substance is soluble
only to very slight extent either in alco.
hol or in watery solution of sugar.
Electric lighting of trains has been in
troduced on the Vienna and Trieste Rail
road. So long as the speed is about 81
miles an hour the illumination is good,
steady and efficient whenever it falls to
II mlles the light is not satisfactory, not.
withstanding the connection Of accumula-
tors with the lamps. It would seem, how
ever that what measurable degree of fail
ure there may be when the train climbs up
the steep slopes of the Ssmmeriug, be-
tween the stations of Gloggnitz and Alurz-
zuschlag, is simply matter Of easily REM
edied detail.
NJ Haddebault, says a technical Journal,
has discovered msthoi Of preparing sol
uble wool from tissues in which wool and
cotton are combined. When subjected to
q current of superheated steam, under a
pressure Of about five atmospheres, the
wool mtl-s and falls to the bottom Of the
pan, leaving the cotton, linen ard other
vegetable Gbers clean and in = condition
suitable for pspsr-making. The melted
wool is sE5erward evaporated 20 dryness,
when il becomes soluble IL water, and is
called az5tiEe, q substance of consider
able agricultural value.
While Mr.. Preece has announced that
Shere is no difference in the conducting
power of lightning rode, Wieder's ARRalen
states :" Holtz has concluded that solid
steel bars do not form so good permanent
magnets as tubes, because the core acts as
an srmature Joining the two poles. In ex-
perimenting TO test his hypothesis he mag.
netized rods and tubes to saturation, and
saw that the magnetism of the tube gave
an excess of more than so per cent. After
waiting for SIX months he subjected the
same magnets 70 new tests in order to dis
cover which retained the magnetism best
He found that the magnetism Of the solid
was to that of the hollow magnets in one
case as l:2 >. and in another as > 9.
Dr. Frarzjus finds that the tooth most
often Altered by decay is the third molar,
such cases forming oDe-half Of the total
number. Ire teeth begin to decay in
certain successive order, the lower third
molar beinG FIRST attacked, then the upper,
then the l)wer fourth molar, and 30
on, the incissors and the canine
teeth of the lower jaw being the last
reached. The upper teeth are more dur.
able than the lower, in the proportion of
three to two. The right teeth show greater
vitality than the lett. The durability of
teeth is less in light persons than in dark,
and less in tall than in short persons.
These results were obtained from an exam
ination of $50 Russian soldiers, of whom
25S had unsound teeth.