The Londonderry sifter. (South Londonderry, Vt.) 1883-19??, 1890-05-22
SCIENTIFIC AND INDUSTRIAL.

1t is now proposed to run street cars
by air.
Cinnamon is fatal to the typhoid
microbe.
In this country eighteen persons out
Of every 1000 die each year.
A rival to caffeine, as muscle bracing
and stimulating drug, has been found in
kola.
Soda was formerly made from the ashes
of sea weeds, but is now made from
common salt.
Soapstone, mixed with quick drying
varnish, is said to have proven success
full anti-corrosive paint for vessels.
An English electrician has invented
material that he calls 'alterion," for
the prevention of corrosion in boilers.
The first electric cars in Germany are
to be introduced at Halle. The Ameri-
can overhead system will be employed.
The pain of burns may be relieved by
allowing the contents of syphon of
settler water to flow over the affected
parts.
Electrician Edison is working upon
an invention which will reproduce the
faces of the speakers sat the other end
of the line"
Saleratus (salt aeratedD was obtained
from pearlash, or potash. 1t is the SAINT
in effect as soda, but the latter is now
more commonly used.
According to a recent work on longev-
ity, published in Norway, the average
duration of life in that country is 4S. 80
years for men, and 5l.3 for women.
A big English manufacturing firm has
offered reward to its firemen who save
the most fuel The firm is convinced
improper firing is responsible for great
waste.
Carbolic acid is recommended for
moistening the tools with which metals
are worked. The efficiency OF the grind
stone is said to be greatly increased by
this means.
The unusually large number of 1l2
species of migratory birds has been seen
in the vicinity of Philadelphia this sea-
son, according to the Delaware Ornitho-
logical Club.
An English photographer mention:
two instances of the production of a
photograph in natural colors when the
exposure was made by accident, just at
the moment of lightning flash.
Experts claim that if steel ships are
properly painted with good paint aud the
plates properly "pickled' they would
last as long as iron, otherwise they would
deteriorate more rapidly than iron ships.
A concern at Newburg, n. Y, is
working night and day, turning out ice
machines, by which it is claimed ice can
be made for $3.50 per ton. The
machine-made ice has this advantage,
that it is perfectly pure.
In cases where there has been exces
sive vibration noticed with engines
boltei to beams or girde-s of the upper
storie. of buildings, hanging heav,
weights from the bottom of the engines
has overcome the vibration almost en-
tirely.
"Sun sickness" is the term applied tc
the condition of the people of Melbourne
Australia, who recently passed through I
torrid season. So abnormal was tn
heat, that the natives OF Madras, and ma
tives from Sierra Leone, Africa, suffered
more than they had ever suffered in thei
native chimes.
A new kind of toothed wheel has beer
invented, the construction and arrange
ment of which arc such that tooth, o
the teeth, may be easily and readily re
moved in case of any injury or breakag
taking place, and new ones substituted
The simplicity of the arrangement is sal
TO assure its adoption.