Daily inter mountain. [volume] (Butte, Mont.) 1881-1901, 1900-01-20

A kim OF combination telescope and
microscope has been worked out by a
French microscopic for studying live
insects and their habits. The new Rp-
paratus is called the 'telemicroscope,"
and is really a small telescope having an
! objective formed of two achrOmatic
i~1enses, which can be moved nearer, to-
| gether oh separated by sliding the tubes
For the purpose intended, the magnify,
ing power necessary is only 10 to Is diam
eters. Besides serving for watching in
sects, moving on the ground, the instru-
ment, it is stated, is admirably adapted
for use as a f1eld-glass. So r
The slight variations in the body heat
of animals, even in the greatest changes
of atmospheric temperature, is one Of
the wonders of physiology. M. Francois
Stepinski finds hat the average tempera-
ture of man in health is 90 degrees, m
that the variation from this is rarely
more than 2 to 3 degrees, although there
are regular daily changes Of tempera-
ture. slight s~easonable variations, and
a slight rise after eating n work of any
kind. Age makes much less difference
than is usually supposed. Yet while the
average central temperature is so con-
slant, there "a be striking local varia-
tions, n the skin temperature some
times differs 4 to IL degrees in a few
hours. Disease, as is we'll known, great
ly affects bodily temperature.
The deafness of locomotive engineers
and firemen has been looked upon as an
effect of the whistle. Mr.. George Trebel
points out that this cannot be so, and
finds that the engineers are deaf in the
right ear n the firemen in the left,
leading him to suggest that the cause
is the impact of the wind on the ear
drum as the men lean from the cab.
The sound of the whistle is scarcely no.
ticeable, while the men on the Slow
moving yard engines are not affected.
A strong dislike to the odor of pepper
mint has been discovered in mice. Cot
ton soaked in peppermint oil caused them
to go away for a considerable time, and
after a second application they disap-
peared completely.
To double the capacity of a power plant.
without Increasing the size Of the botlers
or the consumption of fuel, is a rather
startling proposition at the present day.
This result however, is what Prof. Jesse,
of the Technical High school of Berlin,
believes he can achieve through a device
that was tested unsucessfully some ten
years ago, the idea being to run a second
engine. driven by suphurous acid or other
Hquied OF very low boiling point, with
he heat of the exhaust steam from the
first engine. In the new auxiliary en-.
CINE the sulphurous acid is made to PASS
through a complete cycle of v~aporix&tioni
and condensation. For each Indicated
horsepower hour the normal steam con.
supmtlon OF the steam engine WORKING
alone was ~ pounds. and this was reduce
ed to II pounds when both machines
worked together. while it Is believed that
a reduction to about 8.25 pounds II prac.
ticable on large engineA TO-
Every promising substitute for ruhher
and gutta percha 10 being eagearly vnyes-
tigated. Velvral. q new ARTIFICIAL rubber
lately described by Nj. Walter +. Reid
is a mixture of nitrated linseed or casfor
OIL with natro-cellulose the elastic and
other properties being subject to xreat
variation by alterations Ia the proportions
Of the two constituents. The product
can be moulded under heat PRESSURE
or applied in solution, the solvent heinr
then e~vaporated. Velvril has stood fhel
test OF exposure to the English Climatic
better tina rubber. it is superior to v,,i-
canized rubber in it's freedom from action
on copper, and, while it's insulating nro.
perties ave not been fully studied, it can
be recommended already for a great var
iety Of purposes. such as machine belt.
ing. waterproof cloth. hose and tubine
floor coverings. paints. etc. 80
Night-terrors in children are found bv
Dr.. E. Graham Little. a London physician
to be le88 deDeudent ON digestive diuturA-