The Corvallis gazette. [volume] (Corvallis, Or.) 1862-1899, 1883-06-08
Wtrskln { oruallis 6asette.
FRIDAY MORNING, JUNEs, 1883.
SCIENTIFIC MISCELLANY.

Eastern Scientist.
From observations made in, New York
and ighborine cities, DIR. A. A. Julien
concludes that the various stones used for
buildings will retain decent appearance
in walls for the following periods: Coarse
brownstone, from five to fifteen years; lam
mated fine brownstone, from twenty-five 20
fifty years; compact fine brownstone, from
100 to 200 years; Nova Scotia stone, prob
ably from fifty to- 100 years; Ohio sand
stone, 100 years; Caen stone, from thirty
five to forty years; coarse dolonite marble,
forty years; fine marble sixty years; pure
calcareous marble, from fifty to 100 years;
granite, according to variety, from seventy
five to 200 years. Among the chief de
stroyers of the stones are solvent substances
washed from the air by rains, and the heat
of thesun.
The injurious results which have followed
the removal of forests IN the French Alps
have been described by Mons. Demontzey.
These effects have been chiefly the washing
of great quantities of detritus down from
the slopes, the rapid formation of gulleys
and ravines, and the inundation of good
valley land with sand and gravel. To rem
edy further growth OF the gulleys it is pro
posed to build numerous small dams to in
tercept the sediment that is being carried
down by the streams, and to stop the wear
ing away of the bare hiIlsides trees are to
be planted as rapidly as possible.
On the basis of the capillary phenomena,
Be Heen has calculated that cube of wa
ter whose sides measure one twenty fifth of
an inch contains about twenty-five trlllions
of molecules.
DR.. J. E. Pollock considers Chat the evil
dence furnished by the Brompton Hospital
London-which has had by far the most
extensive experience with the disease of
any institution in the world-proves that
consumption is not conveyed from one per
son to another by contact or by breathing
the same air. Atleast, during the thirty
six years the hospital has been in operation,
the medical attendants, nurses, and others
employed about the establishment, have
been unusually free from this affection
Prof. TAFT lately announced to the Royal
Society of Edinburgh that he had succeeded
in obtaining specimen of pure iridium.
and that by means of this and pure ruthen-
ium he expected to succeed in making a
standard thermy y-electric couple. Such an
apparatus would give what he had long
sought-a definite standard for comparing
very high temperatures, such as those of
furnaces, ETC., for which no suitable instru-
ments exist at present.
DR.. John Hupkinson, F. r. s., states
that electric lightning in London must now
cost rather more than lighting by gas. In
regard to future increase in the economy
of the former, it may be said that no ma
terial change can be expected in engines,
boilers OF dynamo machines, although the
fsst' cost of the dynamo machines may be
somewhat lessened. Great improvement is,
however, possible in incandescent lamps.
With these great economy of power can be
had by driving them at high pressure, but
then the lamps soon break down; and the
problem is to so improve the lamps in de
tail that they will last for considerable
time when pressed to their highest efficiency.
By realizing such improvements DR.. Hop
kinson believes it would be possible to get
fixe times IS much light for a sovereign as
can be done now.
A series of photographs Illustrative OF
some experiments made by Prof. Won
Ziemssen formed curious exhibit at the
Munich Electrical exhibition. These pic.
lures showed human face bearing the ex.
pressions of Joy, pain, surprise, doubt dis
gust, ETC., the various changes having been
each excited in turn by bringing a current
Q of electricity to act upon the different facia
nerves of the person photographed. Under
the electric influence each set of nerve.
produced its own peculiar contortions of the
countenance.
Montreal, which so handsomely enter
tanned the American Association for thu
Advancement of Science last summer is te
receive visit from the British Association
IN 1854, and no less than $40 members O
She latter body have already sigui6ed theil
intention of attending the Canada meeting
From a discussion, of the sunshine records
made in Great Britain during the years 1885
and 1882, Mr.. w. W. Rundell, F. M. s.
makes it appear that the coast enjoys NOR
bright sunshine than the inland country.
In a paper read before Manchester ENG.
association, Mr.. Veitch- Wilson, after re
counting his experiments with lubricants
stated that the safest, most efficient ant
most economical lubricants for all kinds O
bearings are to be produced by judiciou
mixtures of animal or vegetable with goo'
mineral oils.
After being broken on a testing machin
bars of steel and iron are found to be mag
netic. Bissinger finds-that the phenomeno
is not due to an elongation of; the bar bu
to the shock and trembling of the metal o
breaking; and both parts are converted int
magnets of sensibly equal power
When yon come to town to do, business
never patronize person who does not ad
vertise in your county paper; because tn
advel tiser gains the largest patronage, b
the use of printers Ink and by So doing,
can always sell to you cheaper, than tt
party can who waits for the customers
happen along and stumble over his place
LuciDoos ,ofopa he 1oar rns hat tho dao he