The Princeton union., 1891-04-23

many facts Of great scientific interest,
such as the discovery sof insects be-
tween the gnats and the short t-winged
flies, and much knowledge concerning
the early history of ants. The most
numerously represented of the insects
found are tWo-Winged flies, Of which
20, 900 have been counted from these
ancient fytraps. Lice, gnats and mo-
squltoes are not numerous. Some
1000 specimens of beetles have been
noted, and 5000 members of the
white ant and the dragon-hy family.
besides cockroaches, crickets, locusts,
leaf-insects, and more than 1000
kinds of butterflies and moths. The
amber encloses also spiders, centipe-
des, and even parts of birds, lizards
and other creatures.
The Smallest Steam Engine:
1t is said that Thos. Ticknor, of
Parkhill, Ont, has succeeded, after
tive years OF experimenting and labor,
in completing one OF the most unique
and ingenious mechanical contrivances
ever seen. It is perfect model of a.
steam engine, complete in every detail,
and works with the accuracy and ease
OF a Corliss. The dimensions and
capacity of the little engine are as
follows: Diameter of cylinder, 1-48 of
an inch, stroke, 1872 of an inch; weight,
4 OF a grain; bore OF cylinder, .3125
OF am inch; revolution, .176O per
minute; horsepower, .1249O part of
horsepower
The little thing is so small that it
can easily be covered with the shell of
~ callbre cartridge, being two-thirds
smaller than the famous Waterbury
engine that attracted so much atten-
t1on at the last Centennial Mr.. Tick
nor used to charge a fee for seeing the
little engine In perfect running order,
and performing in miniature the same
work as themost massive engines con-
structed, but he has now added it to
the many interesting sights in his shop
in that town.-Am. Mani. and Iron
World
Hypnotism In Dentistry.
Hypnotism in dentistry is one of the
latest developments OF the art An
interesting experiment was described
at a meeting of a Dental Association.
A lady patient, he said, consulted him.
recently as to the extraction of a very
firmly embedded right lower first mo-
lar. AS she had previously been hyp-
Noticed for headaches and other all
ments, and always proved a suscepti-
bic subject her medical adviser sug-
gested that she should be hypnotized
before the tooth was spulled. Thela
consented, and the doctor hypnotized
her in Mr.. Roberts operating room.
When she was quite under influence
she was asked to walk to the dental
chair and did So. Mr.. Roberts then
asked her to open her mouth, and told
her that the tooth would be extracted
without any pain. She obeyed and
did not evidence the slightest pain
while the TOOTH was being pulled up.
The patient was then awakened; she
said she had not felt the removal Of
the toot; neither has she experienced
any discomfort SINCE:
Tobacco Rendered Harmless.
Smokers may be- pleased to learn
that a method has, been discovered
of rendering tobacco, harmless to
mouth, heart, and nerves. without
detriment to- it's aroma. A piece
OF cotton wool stepped in solution
Is to 10 per Gently of pyrogallic
acid inserted in the pipe or cigar
holder will neutralize any possible ef-
fects Of the nicotine. In this way not
only may the generally admitted evils
OF smoking be prevent ed, but cirrhosis
OF the liver, which in DR.. Gautrelet's
experience is sometimes caused by to-
bacco, and such lighter penalties of
over indulgence as headache and fur
ring OF the tongue may be avoided.
Cltric acid, which was recommended
by Vigier for the same purpose, has
the serious disadvantage OF spelling
the taste of the tobacco.
A Cement for Iron.
Thefollowing mixture for the cement
ing OF IRON is, strongly recommended,
says the Engineer. Equal parts of
sulpher and white lead, with about
one-sixth proportion Of borax, are the
constituents OF the mixture, and the
three should be thoroughly incorpor-
ated together soas to form one homo
geneous mass. When decomposition
is to be applied it should be wetted
with strong sulphurie acid, and thin
layer of it should be placed between
the two pieces OF iron to be connected,
these being at once pressed together
The cement will hold so firmly as to
resist the blow of g. steam hammer,
and dry SO completely in few days
as to leave no trace of cement, the
work then presenting the appearance
Of welding.