The Londonderry sifter. (South Londonderry, Vt.) 1883-19??, 1889-06-27
SCIENTIFIC AND INDUSTRIAL.

American yellow pine is great favor
ite for wooden pavements in Berlin.
The Westinghouse alternating electric
current is said to have killed twenty per-
sons.
A scheme is on foot for the holding OF
an international electrical exhibition next
year in Edinburgh.
Tea is strong narcotic and contains
an alkaloid known as theme, which is the
active principle of caffeine.
Paper as tough as wood is said to be
made by mixing chloride of zinc with the
pulp in course of manufacture.
Locomotives to be run by soda are to
be introduced in Minneapolis where steam
engines are forbidden for street use.
The latest railway signal indicates au-
tomatically the time that has elapsed,
up to twenty minutes, since the last train
passed it.
Quartz is said to be very useful as an
insulator in electrostatic apparatus, as
the troublesome sulphuric acid can then
be dispensed with.
Markings gun fires 700 shots per min
ute. 1t was offered to the American
Government but was declined. Now the
British Government has control of it.
The English service journals state that
satisfactory experiments have been made
in the application of volatile hydra car
bons in place of water for producing
power.
Petroleum, which has been used for
some time in connection with raising
steam, is now rapidly coming into vogue
for heating, melting and the working Of
metals.
Every book drawn from public library
| should be disinfected when returned.
If bank bills can carry and spread cpl
denies public books are surely unsafe I'M
less disinfected.
An improved headlight for locomotives
has been designed. 1t has an adjustment
which makes it possible for the engineer
to conveniently direct the light, as he
may desire, to various points Of the line.
/ The worst you can do to your face,
next to rubbing on poison, is to have the
barber shave you close. The English
4 doctors have protested so vigorously that
no English barber dares scrape the cuticle
. of a customer.
| biologists will be interested in the ex.
hibit of the principality of Monaco at the
Paris Exhibition, as all the implements
! used by the Prince in his dredging ex-
periments are to be shown, with numer.
Gus specimens of deep-sea fauna.
| The chrotograph is pencil manufac.
tured in Germany for writing on the
skin. It is made in various colors, and
affords legible writing, which can be
easily removed without the use of water
It is designed for the use of physicians,
to make memoranda upon their patients
The new powder which isnow used il
the German army for sitting into the
shoes and stockings of the foot-soldieri
consists of three parts of salicylic acid
ten of starch and eightyseven of pulver
lied soapstone. The mixture keeps tn,
feet dry, prevents chatting and rapid.
heals sore spots.
| The ''regal red poppy" has recent.
been found to have the value power O
binding with its roots the soil in which 1
grows in such a manner that it will prov
most valuable in supporting embank
ments. Already several French engineer
have undertaken the sowing of railwa,
embankments with peoples.
/ Coal-tar, formerly troublesome vast
of the gas industry, affords us about six
teen distinct yellow colors, about twelv
oranges, more than thirty reds, abou
sixteen blues, seven greens, nine violet
and a number of browns and blacks, be
! sides mixtures of compounds, producin,
an almost infinite number of shades ant
tones of color.